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POOLING AND SERVICING AGREEMENT

Pooling and Servicing Agreement

POOLING AND SERVICING AGREEMENT | Document Parties: RASC SERIES 2005-KS12 TRUST | RESIDENTIAL ASSET SECURITIES CORPORATION, | RESIDENTIAL FUNDING CORPORATION, | U.S. BANK NATIONAL ASSOCIATION You are currently viewing:
This Pooling and Servicing Agreement involves

RASC SERIES 2005-KS12 TRUST | RESIDENTIAL ASSET SECURITIES CORPORATION, | RESIDENTIAL FUNDING CORPORATION, | U.S. BANK NATIONAL ASSOCIATION

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Title: POOLING AND SERVICING AGREEMENT
Governing Law: New York     Date: 1/13/2006

POOLING AND SERVICING AGREEMENT, Parties: rasc series 2005-ks12 trust , residential asset securities corporation  , residential funding corporation  , u.s. bank national association
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                    RESIDENTIAL ASSET SECURITIES CORPORATION,

                                   Depositor,

                        RESIDENTIAL FUNDING CORPORATION,

                                Master Servicer,

                                       and

                         U.S. BANK NATIONAL ASSOCIATION

                                     Trustee





                         POOLING AND SERVICING AGREEMENT

                          Dated as of December 1, 2005





           Home Equity Mortgage Asset-Backed Pass-Through Certificates

                                Series 2005-KS12

<PAGE>
<TABLE>
<CAPTION>

                                TABLE OF CONTENTS

                                                                                          PAGE

<S>                                                                                         <C>
ARTICLE I DEFINITIONS.......................................................................3

         Section 1.01.      Definitions.......................................................3

        Section 1.02.      Determination of LIBOR...........................................41

ARTICLE II CONVEYANCE OF MORTGAGE LOANS; ORIGINAL ISSUANCE OF CERTIFICATES.................42

        Section 2.01.      Conveyance of Mortgage Loans.....................................42

        Section 2.02.      Acceptance by Trustee............................................45

        Section 2.03.      Representations, Warranties and Covenants of the Master
                          Servicer and the Depositor.......................................46

        Section 2.04.      Representations and Warranties of Sellers........................48

        Section 2.05.       Execution and Authentication of Certificates; Conveyance of
                          REMIC-I Regular Interests........................................50

        Section 2.06.      Purposes and Powers of the Trust.................................50

         Section 2.07.      Agreement Regarding Ability to Disclose..........................51

ARTICLE III ADMINISTRATION AND SERVICING OF MORTGAGE LOANS.................................52

        Section 3.01.      Master Servicer to Act as Servicer...............................52

        Section 3.02.      Subservicing Agreements Between Master Servicer and
                          Subservicers; Enforcement of Subservicers' Obligations...........54

        Section 3.03.      Successor Subservicers...........................................55

        Section 3.04.      Liability of the Master Servicer.................................55

        Section 3.05.      No Contractual Relationship Between Subservicer and Trustee
                          or Certificateholders............................................56

        Section 3.06.      Assumption or Termination of Subservicing Agreements by
                          Trustee..........................................................56

        Section 3.07.      Collection of Certain Mortgage Loan Payments; Deposits to
                          Custodial Account................................................56

        Section 3.08.      Subservicing Accounts; Servicing Accounts........................58

         Section 3.09.      Access to Certain Documentation and Information Regarding
                          the Mortgage Loans...............................................60

        Section 3.10.      Permitted Withdrawals from the Custodial Account.................60

        Section 3.11.      Maintenance of Primary Insurance Coverage........................62

        Section 3.12.      Maintenance of Fire Insurance and Omissions and Fidelity
                          Coverage.........................................................62

        Section 3.13.      Enforcement of Due-on-Sale Clauses; Assumption and
                          Modification Agreements; Certain Assignments.....................63

        Section 3.14.      Realization Upon Defaulted Mortgage Loans........................65

        Section 3.15.      Trustee to Cooperate; Release of Mortgage Files..................67

        Section 3.16.      Servicing and Other Compensation; Compensating Interest..........68

        Section 3.17.       Reports to the Trustee and the Depositor.........................69

        Section 3.18.      Annual Statement as to Compliance................................69

        Section 3.19.      Annual Independent Public Accountants' Servicing Report..........70

        Section 3.20.      Right of the Depositor in Respect of the Master Servicer.........70

        Section 3.21.      [Reserved].......................................................71

        Section 3.22.      Advance Facility.................................................71

ARTICLE IV PAYMENTS TO CERTIFICATEHOLDERS..................................................75

        Section 4.01.      Certificate Account..............................................75

        Section 4.02.      Distributions....................................................75

        Section 4.03.      Statements to Certificateholders; Statements to Rating
                          Agencies; Exchange Act Reporting.................................78

        Section 4.04.      Distribution of Reports to the Trustee and the Depositor;
                          Advances by the Master Servicer..................................81

        Section 4.05.      Allocation of Realized Losses....................................82

        Section 4.06.      Reports of Foreclosures and Abandonment of Mortgaged
                          Property.........................................................84

        Section 4.07.      Optional Purchase of Defaulted Mortgage Loans....................84

        Section 4.08.      Limited Mortgage Loan Repurchase Right...........................84

        Section 4.09.      Derivative Contracts.............................................85

        Section 4.10.      Yield Maintenance Agreement......................................86

ARTICLE V THE CERTIFICATES.................................................................87

        Section 5.01.      The Certificates.................................................87

        Section 5.02.      Registration of Transfer and Exchange of Certificates............88

        Section 5.03.      Mutilated, Destroyed, Lost or Stolen Certificates................93

        Section 5.04.      Persons Deemed Owners............................................93

        Section 5.05.      Appointment of Paying Agent......................................93

ARTICLE VI THE DEPOSITOR AND THE MASTER SERVICER...........................................95

        Section 6.01.      Respective Liabilities of the Depositor and the Master
                          Servicer.........................................................95

        Section 6.02.      Merger or Consolidation of the Depositor or the Master
                          Servicer; Assignment of Rights and Delegation of Duties by
                          Master Servicer..................................................95

        Section 6.03.      Limitation on Liability of the Depositor, the Master
                          Servicer and Others..............................................96

        Section 6.04.      Depositor and Master Servicer Not to Resign......................96

ARTICLE VII DEFAULT........................................................................97

        Section 7.01.      Events of Default................................................97

        Section 7.02.      Trustee or Depositor to Act; Appointment of Successor............98

        Section 7.03.      Notification to Certificateholders...............................99

        Section 7.04.      Waiver of Events of Default.....................................100

ARTICLE VIII CONCERNING THE TRUSTEE.......................................................101

        Section 8.01.      Duties of Trustee...............................................101

        Section 8.02.      Certain Matters Affecting the Trustee...........................102

        Section 8.03.      Trustee Not Liable for Certificates or Mortgage Loans...........103

        Section 8.04.      Trustee May Own Certificates....................................104

        Section 8.05.      Master Servicer to Pay Trustee's Fees and Expenses;
                          Indemnification.................................................104

        Section 8.06.      Eligibility Requirements for Trustee............................105

        Section 8.07.      Resignation and Removal of the Trustee..........................105

        Section 8.08.      Successor Trustee...............................................106

        Section 8.09.      Merger or Consolidation of Trustee..............................106

        Section 8.10.      Appointment of Co-Trustee or Separate Trustee...................106

        Section 8.11.      Appointment of Custodians.......................................107

        Section 8.12.      Appointment of Office or Agency.................................108

        Section 8.13.      DTC Letter of Representations...................................108

        Section 8.14.      Yield Maintenance Agreement.....................................108

ARTICLE IX TERMINATION....................................................................109

        Section 9.01.      Termination Upon Purchase or Liquidation of All Mortgage
                           Loans...........................................................109

        Section 9.02.      Additional Termination Requirements.............................112

ARTICLE X REMIC PROVISIONS................................................................114

        Section 10.01.     REMIC Administration............................................114

        Section 10.02.     Master Servicer, REMIC Administrator and Trustee
                          Indemnification.................................................117

ARTICLE XI MISCELLANEOUS PROVISIONS.......................................................118

        Section 11.01.     Amendment.......................................................118

        Section 11.02.     Recordation of Agreement; Counterparts..........................120

        Section 11.03.     Limitation on Rights of Certificateholders......................120

        Section 11.04.     Governing Law...................................................121

        Section 11.05.     Notices.........................................................121

        Section 11.06.     Notices to Rating Agencies......................................122

        Section 11.07.     Severability of Provisions......................................122

        Section 11.08.     Supplemental Provisions for Resecuritization....................122

        Section 11.09.     Third-Party Beneficiary.........................................123



Exhibit A       Form of Class A Certificate................................................A-1

Exhibit B       Form of Class M Certificate................................................B-1

Exhibit C       Form of Class SB Certificate...............................................C-1

Exhibit D       Form of Class R Certificate................................................D-1

Exhibit E       Form of Custodial Agreement................................................E-1

Exhibit F       Loan Schedule..............................................................F-1

Exhibit G       Form of Request for Release................................................G-1

Exhibit H-1     Form of Transfer Affidavit and Agreement.................................H-1-1

Exhibit H-2     Form of Transferor Certificate...........................................H-2-1

Exhibit I       Form of Investor Representation Letter.....................................I-1

Exhibit J       Form of Transferor Representation Letter...................................J-1

Exhibit K       Text of Amendment to Pooling and Servicing Agreement Pursuant to
               Section 11.01(e) for a Limited Guaranty....................................K-1

Exhibit L       Form of Limited Guaranty...................................................L-1

Exhibit M        Form of Lender Certification for Assignment of Mortgage Loan...............M-1

Exhibit N       Form of Rule 144A Investment Representation................................N-1

Exhibit O       [Reserved].................................................................O-1

Exhibit P       Form of ERISA Letter.......................................................P-1

Exhibit Q       [Reserved].................................................................Q-1

Exhibit R       Assignment Agreement......................................................R-1

Exhibit S       [Reserved].................................................................S-1

Exhibit T-1     Form of 10-K Certification...............................................T-1-1

Exhibit T-2     Form of Back-Up Certification............................................T-2-1

Exhibit U       Information to be Provided by the Master Servicer to the Rating
               Agencies Relating to Reportable Modified Mortgage Loans....................U-1


</TABLE>



<PAGE>



        This Pooling and Servicing Agreement,   effective as of December 1, 2005,
among RESIDENTIAL ASSET SECURITIES CORPORATION,   as the depositor (together with
its permitted   successors and assigns,   the   "Depositor"),   RESIDENTIAL   FUNDING
CORPORATION,   as master   servicer   (together   with its permitted   successors and
assigns, the "Master Servicer"),   and U.S. BANK NATIONAL ASSOCIATION,   a banking
association   organized under the laws of the United States, as trustee (together
with its permitted successors and assigns, the "Trustee").

                             PRELIMINARY STATEMENT:

        The   Depositor   intends   to   sell   mortgage   asset-backed    pass-through
certificates   (collectively,   the   "Certificates"),   to be issued   hereunder   in
fifteen   Classes,   which in the aggregate   will   evidence the entire   beneficial
ownership   interest in the Mortgage Loans (as defined   herein) and certain other
related assets.

                                     REMIC I

        As provided   herein,   the REMIC   Administrator   will make an election to
treat the segregated pool of assets consisting of the Mortgage Loans and certain
other related assets (exclusive of the Yield Maintenance   Agreement)   subject to
this   Agreement   as a real estate   mortgage   investment   conduit (a "REMIC") for
federal   income   tax   purposes,   and   such   segregated   pool of   assets   will be
designated   as "REMIC I." The Class R-I   Certificates   will   represent   the sole
Class of "residual   interests"   in REMIC I for purposes of the REMIC   Provisions
(as   defined    herein)   under   federal   income   tax   law.   The   following   table
irrevocably   sets forth the   designation,   remittance rate (the   "Uncertificated
REMIC I Pass-Through   Rate") and initial   Uncertificated   Principal   Balance for
each of the "regular   interests"   in REMIC I (the "REMIC I Regular   Interests").
The   "latest   possible   maturity   date"   (determined    solely   for   purposes   of
satisfying   Treasury   regulation Section   1.860G-1(a)(4)(iii))   for each REMIC I
Regular   Interest   shall   be the   Maturity   Date.   None of the   REMIC I   Regular
Interests will be certificated.

<TABLE>
<CAPTION>

                   UNCERTIFICATED             INITIAL UNCERTIFICATED
                      REMIC I                          REMIC I                   LATEST POSSIBLE
  DESIGNATION       PASS-THROUGH RATE            PRINCIPAL BALANCE               MATURITY DATE
<S>       <C>                    <C>           <C>                                       <C> <C>
      LT-1              Variable(1)           $ 1,149,803,916.72                January 25, 2036
      LT-2              Variable(1)        $              33,773.90              January 25, 2036
      LT-3                 0.00%           $              81,226.12              January 25, 2036
      LT-4              Variable(1)        $              81,226.12              January 25, 2036
</TABLE>

_______________
(1)   Calculated   as   provided   in   the   definition   of   Uncertificated   REMIC   I
Pass-Through Rate.

                                     REMIC II

        As   provided   herein,   the REMIC   Administrator   will elect to treat the
segregated pool of assets consisting of the REMIC I Regular Interests as a REMIC
for federal   income tax   purposes,   and such   segregated   pool of assets will be
designated   as REMIC II. The Class R-II   Certificates   will   represent   the sole
Class of "residual   interests" in REMIC II for purposes of the REMIC   Provisions
under federal   income tax law. The following   table   irrevocably   sets forth the
designation, Pass-Through Rate, aggregate Initial Certificate Principal Balance,
certain features, month of Final Scheduled Distribution Date and initial ratings
for each Class of Certificates   comprising the interests   representing   "regular
interests" in REMIC II. The "latest possible maturity date"   (determined   solely
for purposes of satisfying Treasury Regulation Section   1.860G-1(a)(4)(iii)) for
each Class of REMIC II Regular Interests shall be the Maturity Date.
<TABLE>
<CAPTION>

                                                                                           MONTH OF
                                                                                            FINAL
                                            AGGREGATE INITIAL                              SCHEDULED
                             PASS-THROUGH       CERTIFICATE                               DISTRIBUTION
  DESIGNATION        TYPE           RATE        PRINCIPAL BALANCE          FEATURES               DATE
                                                                                                          S&P      Moody's
<S>        <C>           <C>             <C>      <C>                                               <C>                    
  Class A-1      Regular(1)   Adjustable(2)(3)   $427,287,000.00      Senior/Adjustable        June 2026       AAA        Aaa
                                                                            Rate
  Class A-2      Regular(1)   Adjustable(2)(3)   $435,701,000.00      Senior/Adjustable       April 2035       AAA        Aaa
                                                                             Rate
  Class A-3      Regular(1)   Adjustable(2)(3) $   48,387,000.00      Senior/Adjustable      January 2036      AAA        Aaa
                                                                             Rate
  Class M-1      Regular(1)   Adjustable(2)(3) $   43,125,000.00    Mezzanine/Adjustable     January 2036      AA+        Aa1
                                                                            Rate
  Class M-2      Regular(1)   Adjustable(2)(3) $   37,375,000.00    Mezzanine/Adjustable     January 2036      AA+        Aa2
                                                                            Rate
  Class M-3      Regular(1)   Adjustable(2)(3) $   22,425,000.00    Mezzanine/Adjustable     January 2036      AA+        Aa3
                                                                            Rate
  Class M-4      Regular(1)   Adjustable(2)(3) $   20,125,000.00    Mezzanine/Adjustable     January 2036       AA        A1
                                                                             Rate
  Class M-5      Regular(1)   Adjustable(2)(3) $   18,975,000.00    Mezzanine/Adjustable     January 2036       AA        A2
                                                                            Rate
  Class M-6      Regular(1)   Adjustable(2)(3) $   18,400,000.00    Mezzanine/Adjustable     January 2036      AA-        A3
                                                                            Rate
  Class M-7      Regular(1)   Adjustable(2)(3) $   17,250,000.00    Mezzanine/Adjustable     January 2036       A        Baa1
                                                                            Rate
  Class M-8      Regular(1)   Adjustable(2)(3) $   15,525,000.00    Mezzanine/Adjustable     January 2036       A-       Baa2
                                                                            Rate
  Class M-9      Regular(1)   Adjustable(2)(3) $   12,650,000.00    Mezzanine/Adjustable     January 2036      BBB+      Baa3
                                                                             Rate
   Class SB      Regular           (4)          $   32,775,142.85         Subordinate         January 2036      N/R        N/R
                   (4)
</TABLE>

_______________
(1) The Class A and Class M Certificates   will   represent   ownership of REMIC II
    Regular   Interests   together with certain rights to payments to be made from
    amounts received under the Yield Maintenance   Agreement which will be deemed
    made for federal   income tax   purposes   outside of REMIC II by the holder of
    the Class SB Certificates as the owner of the Yield Maintenance Agreement.
(2) The REMIC II Regular   Interests   ownership   of which is   represented   by the
    Class A and Class M   Certificates,   will accrue interest at a per annum rate
    equal to the least of (i) LIBOR plus the applicable Margin, (ii) 14.000% per
    annum and (iii) the Net WAC Cap Rate and the   provisions   for the payment of
    Basis   Risk   Shortfalls   herein,   which   payments   will   not be   part of the
    entitlement of the REMIC II Regular Interests related to such Certificates.
(3) The Class A and Class M   Certificates   will also   entitle   their   holders to
    certain   payments from the Holder of the Class SB Certificates   from amounts
    to which the related REMIC II Regular   Interest is entitled and from amounts
    received under the Yield Maintenance Agreement,   which will not be a part of
    their ownership of the REMIC II Regular Interests.
(4) The   Class   SB   Certificates   will   accrue   interest   as   described   in   the
    definition of Accrued Certificate   Interest.   The Class SB Certificates will
    not accrue interest on their   Certificate   Principal   Balance.   The Class SB
    Certificates will represent   ownership of two REMIC II Regular Interests,   a
    principal only regular   interest   designated REMIC II Regular Interest SB-PO
    and an interest only regular   interest   designated REMIC II Regular Interest
    SB-IO,   which will be entitled to   distributions   as set forth   herein.   The
    rights of the Holder of the Class SB Certificates to payments from the Yield
    Maintenance   Agreement   shall be outside and apart from its rights under the
    REMIC II Regular Interests SB-IO and SB-PO.

        In   consideration   of   the   mutual   agreements   herein   contained,    the
Depositor, the Master Servicer and the Trustee agree as follows:

ARTICLE I......

                                   DEFINITIONS

Section 1.01...Definitions.

        Whenever used in this Agreement, the following words and phrases, unless
the   context   otherwise   requires,   shall have the   meanings   specified   in this
Article.

        Accrued Certificate Interest: With respect to each Distribution Date and
each Class of Class A Certificates   and Class M Certificates,   interest   accrued
during the related Interest Accrual Period on the Certificate   Principal Balance
thereof immediately prior to such Distribution Date at the Pass-Through Rate for
that Distribution Date.

        The amount of Accrued Certificate Interest on each Class of Certificates
shall be reduced by the amount of Prepayment   Interest Shortfalls on the related
Mortgage   Loans   during the prior   calendar   month to the extent not   covered by
Compensating   Interest pursuant to Section 3.16, and by Relief Act Shortfalls on
the related   Mortgage Loans during the related Due Period.   All such   reductions
with respect to the Mortgage Loans will be allocated   among the   Certificates in
proportion   to the   amount   of   Accrued   Certificate   Interest   payable   on such
Certificates on such Distribution Date absent such reductions.

        Accrued Certificate   Interest for any Distribution Date shall further be
reduced by the   interest   portion of Realized   Losses   allocated to any Class of
Certificates pursuant to Section 4.05.

         Accrued Certificate Interest shall accrue on the basis of a 360-day year
and the actual number of days in the related Interest Accrual Period.

        With respect to each   Distribution   Date and the Class SB   Certificates,
interest    accrued   during   the   preceding    Interest    Accrual   Period   at   the
Pass-Through   Rate on the   Notional   Amount as specified   in the   definition   of
Pass-Through   Rate,   immediately prior to such Distribution Date, reduced by any
interest   shortfalls   with respect to the Mortgage Loans,   including   Prepayment
Interest Shortfalls to the extent not covered by Compensating   Interest pursuant
to Section 3.16 or by Excess Cash Flow pursuant to Section   4.02(c)(v) and (vi).
Accrued   Certificate   Interest on the Class SB Certificates   shall accrue on the
basis of a 360-day   year and the actual   number of days in the related   Interest
Accrual Period.

        Adjusted   Mortgage Rate:   With respect to any Mortgage Loan and any date
of determination, the Mortgage Rate borne by the related Mortgage Note, less the
rate at which the related Subservicing Fee accrues.

        Adjustment   Date:   With respect to each   adjustable-rate   Mortgage Loan,
each date set forth in the related   Mortgage   Note on which an adjustment to the
interest rate on such Mortgage Loan becomes effective.

        Advance:   With   respect to any   Mortgage   Loan,   any advance made by the
Master Servicer, pursuant to Section 4.04.

        Affiliate:   With respect to any Person,   any other   Person   controlling,
controlled by or under common   control with such first Person.   For the purposes
of this   definition,   "control"   means the power to direct   the   management   and
policies of such Person,   directly or indirectly,   whether through the ownership
of voting securities,   by contract or otherwise; and the terms "controlling" and
"controlled" have meanings correlative to the foregoing.

        Agreement:   This   Pooling and   Servicing   Agreement   and all   amendments
hereof and supplements hereto.

        Amount Held for Future   Distribution:   With respect to any   Distribution
Date,   the total of the amounts   held in the   Custodial   Account at the close of
business   on the   preceding   Determination   Date on account   of (i)   Liquidation
Proceeds,   Subsequent Recoveries,   Insurance Proceeds,   REO Proceeds,   Principal
Prepayments,   Mortgage Loan purchases made pursuant to Section 2.02,   2.03, 2.04
or 4.07 and Mortgage   Loan   substitutions   made pursuant to Section 2.03 or 2.04
received   or made in the   month   of such   Distribution   Date   (other   than   such
Liquidation Proceeds,   Subsequent   Recoveries,   Insurance Proceeds, REO Proceeds
and purchases of Mortgage Loans that the Master Servicer has deemed to have been
received in the   preceding   month in accordance   with Section   3.07(b)) and (ii)
payments which   represent   early receipt of scheduled   payments of principal and
interest   due on a date or dates   subsequent   to the Due Date in the related Due
Period.

        Appraised Value: With respect to any Mortgaged   Property,   the lesser of
(i) the appraised value of such Mortgaged Property based upon the appraisal made
at the time of the origination of the related   Mortgage Loan, and (ii) the sales
price of the Mortgaged Property at such time of origination,   except in the case
of a Mortgaged   Property   securing a refinanced or modified   Mortgage Loan as to
which it is either the appraised value based upon the appraisal made at the time
of   origination   of the loan which was   refinanced   or modified or the appraised
value determined in an appraisal at the time of refinancing or modification,   as
the case may be.

        Assignment:   An   assignment   of the   Mortgage,   notice   of   transfer   or
equivalent   instrument,   in recordable   form,   sufficient   under the laws of the
jurisdiction   wherein   the related   Mortgaged   Property is located to reflect of
record   the   sale   of the   Mortgage   Loan to the   Trustee   for   the   benefit   of
Certificateholders,    which    assignment,    notice   of   transfer   or   equivalent
instrument   may be in the   form   of one or   more   blanket   assignments   covering
Mortgages   secured   by   Mortgaged   Properties   located   in the same   county,   if
permitted by law and accompanied by an Opinion of Counsel to that effect.

        Assignment Agreement: The Assignment and Assumption Agreement, dated the
Closing Date,   between   Residential   Funding and the   Depositor   relating to the
transfer and assignment of the Mortgage Loans, attached hereto as Exhibit R.

        Available Distribution Amount: With respect to any Distribution Date, an
amount equal to (a) the sum of (i) the amount   relating to the Mortgage Loans on
deposit in the Custodial   Account as of the close of business on the immediately
preceding   Determination Date, including any Subsequent Recoveries,   and amounts
deposited   in the   Custodial   Account in   connection   with the   substitution   of
Qualified   Substitute Mortgage Loans, (ii) the amount of any Advance made on the
immediately   preceding   Certificate   Account   Deposit   Date with   respect to the
Mortgage Loans,   (iii) any amount   deposited in the   Certificate   Account on the
related   Certificate   Account   Deposit Date pursuant to the second   paragraph of
Section   3.12(a) in   respect of the   Mortgage   Loans,   (iv) any amount   that the
Master Servicer is not permitted to withdraw from the Custodial Account pursuant
to   Section   3.16(e)   in   respect   of the   Mortgage   Loans,   and (v) any   amount
deposited in the Certificate Account pursuant to Section 4.07 or 9.01 in respect
of the Mortgage Loans, reduced by (b) the sum as of the close of business on the
immediately   preceding   Determination   Date of (x) the   Amount   Held for   Future
Distribution with respect to the Mortgage Loans, and (y) amounts permitted to be
withdrawn by the Master   Servicer from the   Custodial   Account in respect of the
Mortgage Loans pursuant to clauses (ii)-(x), inclusive, of Section 3.10(a).

        Balloon   Loan:   Each of the Mortgage   Loans   having an original   term to
maturity that is shorter than the related amortization term.

        Balloon   Payment:   With respect to any Balloon Loan, the related Monthly
Payment payable on the stated maturity date of such Balloon Loan.

        Bankruptcy Code:   The Bankruptcy Code of 1978, as amended.

        Basis   Risk   Shortfalls:   With   respect   to each   Class   of the   Class A
Certificates and Class M Certificates, and any Distribution Date, the sum of (a)
with respect to any   Distribution   Date on which the Net WAC Cap Rate is used to
determine the Pass-Through   Rate of such Class, an amount equal to the excess of
(x) Accrued   Certificate   Interest for such Class calculated at a per annum rate
equal to LIBOR plus the related Margin for such   Distribution   Date (which shall
not exceed 14.000% per annum),   over (y) Accrued   Certificate   Interest for such
Class   calculated   using the Net WAC Cap Rate, (b) any shortfalls for such Class
calculated pursuant to clause (a) above remaining unpaid from prior Distribution
Dates,   and (c) one   month's   interest on the amount in clause (b) (based on the
number of days in the   preceding   Interest   Accrual   Period) at a per annum rate
equal to the Pass-Through Rate for such period.

        Book-Entry   Certificate:   Any Certificate   registered in the name of the
Depository or its nominee.

         Business   Day:   Any day other than (i) a Saturday   or a Sunday or (ii) a
day on which   banking   institutions   in the   State of   California,   the State of
Minnesota,   the State of Texas,   the State of New York or the State of   Illinois
(and   such   other   state   or   states   in   which   the   Custodial   Account   or the
Certificate   Account are at the time   located) are required or authorized by law
or executive order to be closed.

        Capitalization   Reimbursement   Amount:   With respect to any Distribution
Date, the amount of Advances or Servicing Advances that were added to the Stated
Principal   Balance of the   Mortgage   Loans during the prior   calendar   month and
reimbursed   to   the   Master    Servicer   or   Subservicer   on   or   prior   to   such
Distribution Date pursuant to Section 3.10(a)(vii).

        Cash Liquidation: With respect to any defaulted Mortgage Loan other than
a Mortgage Loan as to which an REO Acquisition   occurred, a determination by the
Master   Servicer   that   it has   received   all   Insurance   Proceeds,   Liquidation
Proceeds   and   other   payments   or cash   recoveries   which the   Master   Servicer
reasonably and in good faith expects to be finally   recoverable   with respect to
such Mortgage Loan.

        Certificate:   Any Class A   Certificate,   Class M   Certificate,   Class SB
Certificate or Class R Certificate.

        Certificate   Account:   The   account or accounts   created and   maintained
pursuant   to   Section   4.01,    which   shall   be   entitled   "U.S.   Bank   National
Association,   as trustee,   in trust for the   registered   holders of   Residential
Asset Securities   Corporation,   Home Equity Mortgage   Asset-Backed   Pass-Through
Certificates,   Series 2005-KS12" and which account shall be held for the benefit
of the Certificateholders and which must be an Eligible Account.

        Certificate Account Deposit Date: With respect to any Distribution Date,
the Business Day prior thereto.

        Certificateholder   or Holder:   The Person in whose name a Certificate is
registered   in the   Certificate   Register,   except that   neither a   Disqualified
Organization   nor a   Non-United   States   Person   shall be a holder   of a Class R
Certificate for any purpose hereof. Solely for the purpose of giving any consent
or direction pursuant to this Agreement,   any Certificate,   other than a Class R
Certificate, registered in the name of the Depositor, the Master Servicer or any
Subservicer or any Affiliate   thereof shall be deemed not to be outstanding   and
the Percentage   Interest or Voting Rights   evidenced   thereby shall not be taken
into account in determining whether the requisite amount of Percentage Interests
or Voting   Rights   necessary to effect any such   consent or   direction   has been
obtained.   All   references   herein to   "Holders" or   "Certificateholders"   shall
reflect the rights of Certificate   Owners as they may   indirectly   exercise such
rights through the   Depository   and   participating   members   thereof,   except as
otherwise   specified   herein;   provided,   however,   that   the   Trustee   shall be
required to   recognize as a "Holder" or   "Certificateholder"   only the Person in
whose name a   Certificate   is   registered in the   Certificate   Register.   Unless
otherwise indicated in this Agreement, the Custodial Agreement or the Assignment
Agreement,   whenever   reference   is made to the actions   taken by the Trustee on
behalf of the Certificateholders.

        Certificate Owner: With respect to a Book-Entry Certificate,   the Person
who is the beneficial owner of such Certificate, as reflected on the books of an
indirect participating brokerage firm for which a Depository Participant acts as
agent, if any, and otherwise on the books of a Depository   Participant,   if any,
and otherwise on the books of the Depository.

        Certificate   Principal Balance:   With respect to any Class A Certificate
or Class M Certificate, on any date of determination, an amount equal to (i) the
Initial   Certificate   Principal   Balance of such Certificate as specified on the
face thereof,   minus (ii) the sum of (x) the aggregate of all amounts previously
distributed   with respect to such   Certificate (or any predecessor   Certificate)
and applied to reduce the   Certificate   Principal   Balance   thereof   pursuant to
Section 4.02(c) and (y) the aggregate of all reductions in Certificate Principal
Balance   deemed to have occurred in connection   with Realized   Losses which were
previously   allocated   to   such   Certificate   (or any   predecessor   Certificate)
pursuant to Section 4.05; provided,   that with respect to any Distribution Date,
the   Certificate    Principal   Balance   of   any   outstanding   Class   of   Class   A
Certificates and Class M Certificates (with respect to the Class A Certificates,
on a pro rata basis based on the amount of Realized   Loss   previously   allocated
thereto and   remaining   unreimbursed)   to which a Realized   Loss was   previously
allocated and remains unreimbursed will be increased,   to the extent of Realized
Losses previously allocated thereto and remaining unreimbursed,   but only to the
extent of Subsequent   Recoveries   received during the preceding   calendar month.
With   respect   to any Class SB   Certificate,   on any date of   determination,   an
amount   equal   to   the   Percentage    Interest   evidenced   by   such   Certificate,
multiplied   by an   amount   equal   to (i) the   excess,   if any,   of (A) the   then
aggregate   Stated   Principal   Balance   of the   Mortgage   Loans over (B) the then
aggregate   Certificate Principal Balance of the Class A Certificates and Class M
Certificates   then   outstanding,   which   represents   the sum of (i) the   Initial
Principal Balance of the REMIC II Regular Interest SB-PO, as reduced by Realized
Losses allocated thereto and payments deemed made thereon,   and (ii) accrued and
unpaid   interest on the REMIC II Regular   Interest SB-IO, as reduced by Realized
Losses allocated   thereto.   The Class R Certificates will not have a Certificate
Principal Balance.

        Certificate Register and Certificate Registrar:   The register maintained
and the registrar appointed pursuant to Section 5.02.

        Class: Collectively, all of the Certificates or uncertificated interests
bearing the same designation.

        Class A Certificates:   Collectively,   the Class A-1 Certificates,   Class
A-2 Certificates and Class A-3 Certificates.

        Class A Principal   Distribution Amount: With respect to any Distribution
Date   (a)   prior to the   Stepdown   Date or on or after   the   Stepdown   Date if a
Trigger   Event   is   in   effect   for   that    Distribution    Date,   the   Principal
Distribution   Amount for that   Distribution Date or (b) on or after the Stepdown
Date if a Trigger Event is not in effect for that Distribution   Date, the lesser
of:

(i)      the Principal Distribution Amount for that Distribution Date; and

(ii)     the excess, if any, of (A) the aggregate   Certificate   Principal Balance
        of the Class A Certificates   immediately prior to that Distribution Date
        over   (B)   the   lesser   of   (x)   the   product   of   (1)   the    applicable
        Subordination   Percentage and (2) the aggregate Stated Principal Balance
        of the Mortgage Loans after giving effect to distributions to be made on
        that   Distribution   Date and (y) the excess,   if any,   of the   aggregate
        Stated   Principal   Balance of the Mortgage   Loans after giving effect to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class A-1 Certificate: Any one of the Class A-1 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit A, senior to the Class M   Certificates,   Class SB
Certificates   and Class R   Certificates   with respect to   distributions   and the
allocation of Realized   Losses as set forth in Section 4.05,   and   evidencing an
interest   designated   as a "regular   interest"   in REMIC II for   purposes of the
REMIC Provisions.

        Class A-1 Margin:   0.090% per annum.

        Class A-2 Certificate: Any one of the Class A-2 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit A, senior to the Class M   Certificates,   Class SB
Certificates   and Class R   Certificates   with respect to   distributions   and the
allocation of Realized   Losses as set forth in Section 4.05,   and   evidencing an
interest   designated   as a "regular   interest"   in REMIC II for   purposes of the
REMIC Provisions.

        Class A-2 Margin:   Initially,   0.250% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.500% per annum.

        Class A-3 Certificate: Any one of the Class A-3 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit A, senior to the Class M   Certificates,   Class SB
Certificates   and Class R   Certificates   with respect to   distributions   and the
allocation of Realized   Losses as set forth in Section 4.05,   and   evidencing an
interest   designated   as a "regular   interest"   in REMIC II for   purposes of the
REMIC Provisions.

        Class A-3 Margin:   Initially,   0.320% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.640% per annum.

        Class M Certificates:   Collectively,   the Class M-1 Certificates,   Class
M-2   Certificates,   Class M-3 Certificates,   Class M-4   Certificates,   Class M-5
Certificates,    Class   M-6   Certificates,   Class   M-7   Certificates,   Class   M-8
Certificates and Class M-9 Certificates.

        Class M-1 Certificate: Any one of the Class M-1 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-1 Margin:   Initially,   0.440% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.660% per annum.

        Class   M-1    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution   Amount or (b) on or after the Stepdown Date
if a Trigger Event is not in effect for that Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after distribution of the Class A Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal Balance of the Class A Certificates (after taking into account
        the   payment   of the   Class A   Principal   Distribution   Amount   for that
        Distribution   Date) and (2) the   Certificate   Principal   Balance   of the
        Class M-1 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
         Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-2 Certificate: Any one of the Class M-2 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-2 Margin:   Initially,   0.460% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.690% per annum.

        Class   M-2    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the   Class   A   Principal    Distribution   Amount   and   the   Class   M-1   Principal
Distribution   Amount or (b) on or after the Stepdown   Date if a Trigger Event is
not in effect for that Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after distribution of the Class A Principal   Distribution Amount and the
        Class M-1 Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal Balance of the Class A Certificates and Class M-1 Certificates
        (after   taking   into   account   the   payment   of the   Class   A   Principal
        Distribution Amount and the Class M-1 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-2 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-3 Certificate: Any one of the Class M-3 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-3 Margin:   Initially,   0.480% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.720% per annum.

        Class   M-3    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount and the Class M-2   Principal   Distribution   Amount or (b) on or after the
Stepdown   Date if a Trigger Event is not in effect for that   Distribution   Date,
the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class M-1   Principal   Distribution   Amount   and the Class M-2   Principal
        Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1   Certificates
        and Class M-2 Certificates (after taking into account the payment of the
        Class   A   Principal    Distribution    Amount,   the   Class   M-1   Principal
        Distribution Amount and the Class M-2 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-3 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-4 Certificate: Any one of the Class M-4 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-4 Margin:   Initially,   0.640% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 0.960% per annum.

        Class   M-4    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount, the Class M-2 Principal   Distribution Amount and the Class M-3 Principal
Distribution   Amount or (b) on or after the Stepdown   Date if a Trigger Event is
not in effect for that Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution Amount and the Class M-3 Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class M-2   Certificates   and Class M-3   Certificates   (after taking into
        account the payment of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution Amount and the Class M-3 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-4 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
         distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-5 Certificate: Any one of the Class M-5 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

         Class M-5 Margin:   Initially,   0.670% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 1.005% per annum.

        Class   M-5    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount,   the Class M-2 Principal   Distribution   Amount,   the Class M-3 Principal
Distribution Amount and the Class M-4 Principal Distribution Amount or (b) on or
after   the   Stepdown   Date   if a   Trigger   Event   is   not   in   effect   for   that
Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution Amount, the Class M-3 Principal Distribution Amount and the
        Class M-4 Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class   M-2    Certificates,    Class   M-3    Certificates    and   Class   M-4
        Certificates   (after   taking   into   account   the   payment of the Class A
        Principal   Distribution   Amount,   the Class M-1   Principal   Distribution
        Amount,   the   Class M-2   Principal   Distribution   Amount,   the Class M-3
        Principal   Distribution Amount and the Class M-4 Principal   Distribution
        Amount for that   Distribution   Date) and (2) the   Certificate   Principal
        Balance   of   the   Class   M-5   Certificates   immediately   prior   to   that
        Distribution   Date   over (B) the   lesser of (x) the   product   of (1) the
        applicable    Subordination   Percentage   and   (2)   the   aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions to be made on that   Distribution   Date and (y) the excess,
        if any, of the aggregate Stated Principal   Balance of the Mortgage Loans
        after giving   effect to   distributions   to be made on that   Distribution
        Date, over the Overcollateralization Floor.

        Class M-6 Certificate: Any one of the Class M-6 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-6 Margin:   Initially,   0.750% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 1.125% per annum.

        Class   M-6    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount,   the Class M-2 Principal   Distribution   Amount,   the Class M-3 Principal
Distribution   Amount, the Class M-4 Principal   Distribution Amount and the Class
M-5   Principal   Distribution   Amount or (b) on or after the   Stepdown   Date if a
Trigger Event is not in effect for that Distribution Date, the lesser of:

(iii)     the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution   Amount, the Class M-3 Principal   Distribution   Amount, the
        Class M-4   Principal   Distribution   Amount   and the Class M-5   Principal
        Distribution Amount; and

(iv)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class M-2 Certificates,   Class M-3 Certificates,   Class M-4 Certificates
        and Class M-5 Certificates (after taking into account the payment of the
        Class   A   Principal    Distribution    Amount,   the   Class   M-1   Principal
        Distribution   Amount, the Class M-2 Principal   Distribution   Amount, the
        Class   M-3   Principal   Distribution   Amount,   the   Class   M-4   Principal
        Distribution Amount and the Class M-5 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-6 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-7 Certificate: Any one of the Class M-7 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-7 Margin:   Initially,   1.600% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 2.400% per annum.

        Class   M-7    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount,   the Class M-2 Principal   Distribution   Amount,   the Class M-3 Principal
Distribution Amount, the Class M-4 Principal   Distribution Amount, the Class M-5
Principal Distribution Amount and the Class M-6 Principal Distribution Amount or
(b) on or after the Stepdown   Date if a Trigger   Event is not in effect for that
Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution   Amount, the Class M-3 Principal   Distribution   Amount, the
        Class   M-4   Principal   Distribution   Amount,   the   Class   M-5   Principal
        Distribution Amount and the Class M-6 Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class M-2 Certificates,   Class M-3 Certificates, Class M-4 Certificates,
        Class M-5   Certificates   and Class M-6   Certificates   (after taking into
        account the payment of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
         Distribution   Amount, the Class M-3 Principal   Distribution   Amount, the
        Class   M-4   Principal   Distribution   Amount,   the   Class   M-5   Principal
        Distribution Amount and the Class M-6 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-7 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class M-8 Certificate: Any one of the Class M-8 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-8 Margin:   Initially,   2.200% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 3.300% per annum.

        Class   M-8    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount,   the Class M-2 Principal   Distribution   Amount,   the Class M-3 Principal
Distribution Amount, the Class M-4 Principal   Distribution Amount, the Class M-5
Principal   Distribution Amount, the Class M-6 Principal   Distribution Amount and
the Class M-7 Principal Distribution Amount or (b) on or after the Stepdown Date
if a Trigger Event is not in effect for that Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution   Amount, the Class M-3 Principal   Distribution   Amount, the
        Class   M-4   Principal   Distribution   Amount,   the   Class   M-5   Principal
        Distribution Amount, the Class M-6 Principal Distribution Amount and the
         Class M-7 Principal Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class M-2 Certificates,   Class M-3 Certificates, Class M-4 Certificates,
        Class   M-5    Certificates,    Class   M-6    Certificates    and   Class   M-7
        Certificates   (after   taking   into   account   the   payment of the Class A
        Principal   Distribution   Amount,   the Class M-1   Principal   Distribution
        Amount,   the   Class M-2   Principal   Distribution   Amount,   the Class M-3
        Principal   Distribution   Amount,   the Class M-4   Principal   Distribution
        Amount,   the   Class M-5   Principal   Distribution   Amount,   the Class M-6
        Principal   Distribution Amount and the Class M-7 Principal   Distribution
        Amount for that   Distribution   Date) and (2) the   Certificate   Principal
        Balance   of   the   Class   M-8   Certificates   immediately   prior   to   that
         Distribution   Date   over (B) the   lesser of (x) the   product   of (1) the
        applicable    Subordination   Percentage   and   (2)   the   aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions to be made on that   Distribution   Date and (y) the excess,
        if any, of the aggregate Stated Principal   Balance of the Mortgage Loans
        after giving   effect to   distributions   to be made on that   Distribution
        Date, over the Overcollateralization Floor.

        Class M-9 Certificate: Any one of the Class M-9 Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed hereto as Exhibit B, and evidencing (i) an interest designated as a
"regular interest" in REMIC II for purposes of the REMIC Provisions and (ii) the
right to receive payments under the Yield Maintenance Agreement.

        Class M-9 Margin:   Initially,   2.250% per annum, and on any Distribution
Date on and after the second Distribution Date after the first possible Optional
Termination Date, 3.375% per annum.

        Class   M-9    Principal    Distribution    Amount:    With   respect   to   any
Distribution   Date (a) prior to the   Stepdown   Date or on or after the   Stepdown
Date if a Trigger Event is in effect for that   Distribution   Date, the remaining
Principal   Distribution   Amount for that Distribution Date after distribution of
the Class A Principal   Distribution Amount, the Class M-1 Principal Distribution
Amount,   the Class M-2 Principal   Distribution   Amount,   the Class M-3 Principal
Distribution Amount, the Class M-4 Principal   Distribution Amount, the Class M-5
Principal   Distribution Amount, the Class M-6 Principal Distribution Amount, the
Class M-7 Principal Distribution Amount and the Class M-8 Principal Distribution
Amount or (b) on or after the Stepdown   Date if a Trigger Event is not in effect
for that Distribution Date, the lesser of:

(i)      the remaining   Principal   Distribution Amount for that Distribution Date
        after   distribution of the Class A Principal   Distribution   Amount,   the
        Class   M-1   Principal   Distribution   Amount,   the   Class   M-2   Principal
        Distribution   Amount, the Class M-3 Principal   Distribution   Amount, the
         Class   M-4   Principal   Distribution   Amount,   the   Class   M-5   Principal
        Distribution Amount, Class M-6 Principal   Distribution Amount, the Class
        M-7    Principal    Distribution    Amount   and   the   Class   M-8   Principal
        Distribution Amount; and

(ii)     the   excess,   if any,   of (A) the sum of (1) the   aggregate   Certificate
        Principal   Balance of the Class A Certificates,   Class M-1 Certificates,
        Class M-2 Certificates,   Class M-3 Certificates, Class M-4 Certificates,
        Class M-5 Certificates,   Class M-6 Certificates,   Class M-7 Certificates
        and Class M-8 Certificates (after taking into account the payment of the
        Class   A   Principal    Distribution    Amount,   the   Class   M-1   Principal
        Distribution   Amount, the Class M-2 Principal   Distribution   Amount, the
        Class   M-3   Principal   Distribution   Amount,   the   Class   M-4   Principal
        Distribution   Amount, the Class M-5 Principal   Distribution   Amount, the
        Class   M-6   Principal   Distribution   Amount,   the   Class   M-7   Principal
        Distribution Amount and the Class M-8 Principal   Distribution Amount for
        that Distribution Date) and (2) the Certificate Principal Balance of the
        Class M-9 Certificates   immediately prior to that Distribution Date over
        (B) the lesser of (x) the   product of (1) the   applicable   Subordination
        Percentage   and   (2)   the   aggregate   Stated   Principal   Balance   of the
        Mortgage Loans after giving effect to   distributions   to be made on that
        Distribution   Date and (y) the excess,   if any, of the aggregate   Stated
        Principal    Balance   of   the   Mortgage   Loans   after   giving   effect   to
        distributions    to   be   made   on   that    Distribution    Date,   over   the
        Overcollateralization Floor.

        Class R Certificate:   Collectively, the Class R-I Certificates and Class
R-II Certificates.

        Class R-I Certificate: Any one of the Class R-I Certificates executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form annexed   hereto as Exhibit D and   evidencing   an interest   designated   as a
"residual interest" in REMIC I for purposes of the REMIC Provisions.

        Class R-II Certificate:   Any one of the Class R-II Certificates executed
by the Trustee and authenticated by the Certificate   Registrar   substantially in
the form annexed hereto as Exhibit D and evidencing an interest   designated as a
"residual interest" in REMIC II for purposes of the REMIC Provisions.

        Class SB Certificate:   Any one of the Class SB Certificates   executed by
the Trustee and authenticated by the Certificate Registrar   substantially in the
form   annexed   hereto as Exhibit C, and   evidencing   an   interest   comprised   of
"regular   interests" in REMIC II together with certain   rights to payments under
the Yield Maintenance Agreement for purposes of the REMIC Provisions.

        Closing Date:   December 28, 2005.

        Code:   The Internal Revenue Code of 1986.

         Commission:   The Securities and Exchange Commission.

        Compensating Interest: With respect to any Distribution Date, any amount
paid by the Master Servicer in accordance with Section 3.16(f).

        Corporate Trust Office:   The principal office of the Trustee at which at
any particular   time its corporate trust business with respect to this Agreement
shall   be   administered,   which   office   at the   date of the   execution   of this
instrument   is   located   at   U.S.   Bank   National   Association,   EP-MN-WS3D,   60
Livingston Avenue, St. Paul MN 55107, Attn: RASC 2005-KS12.

        Credit Repository: Equifax, Transunion and Experian, or their successors
in interest.

        Curtailment: Any Principal Prepayment made by a Mortgagor which is not a
Principal Prepayment in Full.

        Custodial   Account:   The   custodial   account   or   accounts   created   and
maintained pursuant to Section 3.07 in the name of a depository institution,   as
custodian for the holders of the Certificates,   for the holders of certain other
interests in mortgage loans serviced or sold by the Master   Servicer and for the
Master   Servicer,   into which the   amounts   set forth in   Section   3.07 shall be
deposited directly. Any such account or accounts shall be an Eligible Account.

        Custodial   Agreement:   An   agreement   that may be entered into among the
Depositor, the Master Servicer, the Trustee and a Custodian in substantially the
form of Exhibit E hereto.

        Custodian:   Wells Fargo Bank, N.A., or any successor custodian appointed
pursuant to a Custodial Agreement.

        Cut-off Date:   December 1, 2005.

        Cut-off Date Balance:   $1,150,000,142.85.

        Cut-off Date Principal   Balance:   With respect to any Mortgage Loan, the
unpaid principal   balance thereof at the Cut-off Date after giving effect to all
installments   of principal   due on or prior   thereto (or due in the month of the
Cut-off Date), whether or not received.

        Debt Service   Reduction:   With respect to any Mortgage Loan, a reduction
in the scheduled   Monthly Payment for such Mortgage Loan by a court of competent
jurisdiction in a proceeding under the Bankruptcy Code,   except such a reduction
constituting a Deficient   Valuation or any reduction that results in a permanent
forgiveness of principal.

        Deficient Valuation: With respect to any Mortgage Loan, a valuation by a
court of competent jurisdiction of the Mortgaged Property in an amount less than
the then outstanding   indebtedness   under the Mortgage Loan, or any reduction in
the amount of   principal to be paid in   connection   with any   scheduled   Monthly
Payment that constitutes a permanent   forgiveness of principal,   which valuation
or reduction results from a proceeding under the Bankruptcy Code.

        Definitive Certificate:   Any definitive, fully registered Certificate.

        Deleted Mortgage Loan: A Mortgage Loan replaced or to be replaced with a
Qualified Substitute Mortgage Loan.

        Delinquent:   As used herein, a Mortgage Loan is considered to be: "30 to
59 days" or "30 or more days" delinquent when a payment due on any scheduled due
date remains   unpaid as of the close of business on the next   following   monthly
scheduled   due   date;   "60 to 89 days" or "60 or more   days"   delinquent   when a
payment due on any scheduled due date remains unpaid as of the close of business
on the second following monthly scheduled due date; and so on. The determination
as to whether a Mortgage   Loan   falls   into these   categories   is made as of the
close of   business   on the last   business   day of each   month.   For   example,   a
Mortgage Loan with a payment due on July 1 that remained   unpaid as of the close
of   business   on   August   31   would   then   be   considered   to be   30 to 59   days
delinquent.   Delinquency   information   as of the Cut-off Date is determined   and
prepared as of the close of business on the last business day immediately   prior
to the Cut-off Date.

        Depositor:   As defined in the preamble hereto.

        Depository:   The Depository Trust Company,   or any successor   Depository
hereafter   named.   The   nominee   of   the   initial   Depository   for   purposes   of
registering those Certificates that are to be Book-Entry   Certificates is Cede &
Co. The Depository shall at all times be a "clearing   corporation" as defined in
Section   8-102(a)(5) of the Uniform Commercial Code of the State of New York and
a "clearing agency" registered   pursuant to the provisions of Section 17A of the
Exchange Act.

        Depository   Participant:   A   broker,   dealer,   bank or   other   financial
institution   or other   Person   for whom from time to time a   Depository   effects
book-entry transfers and pledges of securities deposited with the Depository.

        Derivative   Contract:   Any   ISDA   Master   Agreement,   together   with the
related Schedule and Confirmation,   entered into by the Trustee and a Derivative
Counterparty in accordance with Section 4.09.

        Derivative   Counterparty:   Any counterparty to a Derivative   Contract as
provided in Section 4.09.

        Destroyed   Mortgage   Note:   A Mortgage   Note the   original   of which was
permanently lost or destroyed and has not been replaced.

        Determination   Date: With respect to any Distribution Date, the 20th day
(or if such   20th   day is not a   Business   Day,   the   Business   Day   immediately
following such 20th day) of the month of the related Distribution Date.

        Disqualified   Organization:   Any organization defined as a "disqualified
organization" under Section 860E(e)(5) of the Code, including,   if not otherwise
included,   any of the following:   (i) the United States,   any State or political
subdivision   thereof,   any   possession   of the United   States,   or any agency or
instrumentality of any of the foregoing (other than an instrumentality   which is
a   corporation   if all of its   activities   are   subject   to tax and,   except for
Freddie   Mac, a   majority   of its board of   directors   is not   selected   by such
governmental unit), (ii) a foreign government,   any international   organization,
or any agency or instrumentality of any of the foregoing, (iii) any organization
(other than certain farmers' cooperatives   described in Section 521 of the Code)
which is exempt from the tax imposed by Chapter 1 of the Code (including the tax
imposed by Section 511 of the Code on   unrelated   business   taxable   income) and
(iv)   rural    electric    and    telephone    cooperatives    described   in   Section
1381(a)(2)(C)   of the   Code.   A   Disqualified   Organization   also   includes   any
"electing large   partnership,"   as defined in Section 775(a) of the Code and any
other Person so   designated by the Trustee based upon an Opinion of Counsel that
the holding of an Ownership Interest in a Class R Certificate by such Person may
cause   any REMIC or any   Person   having an   Ownership   Interest   in any Class of
Certificates   (other than such Person) to incur a liability   for any federal tax
imposed   under the Code that would not otherwise be imposed but for the Transfer
of an Ownership   Interest in a Class R   Certificate   to such   Person.   The terms
"United   States,"   "State"   and   "international   organization"   shall   have   the
meanings set forth in Section 7701 of the Code or successor provisions.

        Distribution   Date: The 25th day of any month   beginning in January 2006
or,   if such   25th day is not a   Business   Day,   the   Business   Day   immediately
following such 25th day.

        DTC Letter:   The Letter of   Representations,   dated   December   27, 2005,
among the Trustee on behalf of the Trust Fund,   U.S. Bank National   Association,
in its individual capacity as agent thereunder and the Depository.

        Due Date: With respect to any   Distribution   Date and any Mortgage Loan,
the day during the related Due Period on which the Monthly Payment is due.

        Due Period: With respect to any Distribution Date, the calendar month of
such Distribution Date.

        Eligible   Account:   An   account   that   is   any   of   the   following:   (i)
maintained with a depository institution the debt obligations of which have been
rated by each Rating Agency in its highest rating available,   or (ii) an account
or accounts in a depository institution in which such accounts are fully insured
to the limits established by the FDIC, provided that any deposits not so insured
shall, to the extent   acceptable to each Rating Agency, as evidenced in writing,
be maintained such that (as evidenced by an Opinion of Counsel   delivered to the
Trustee and each Rating Agency) the registered   Holders of   Certificates   have a
claim with   respect to the funds in such account or a perfected   first   security
interest    against   any    collateral    (which   shall   be   limited   to   Permitted
Investments)   securing   such   funds   that is   superior   to   claims   of any other
depositors or creditors of the depository institution with which such account is
maintained,   or (iii) in the case of the Custodial   Account,   a trust account or
accounts   maintained   in the   corporate   trust   department of U.S. Bank National
Association,   or (iv) in the case of the Certificate Account, a trust account or
accounts   maintained   in the   corporate   trust   division of U.S.   Bank   National
Association,   or   (v)   an   account   or   accounts   of   a   depository   institution
acceptable   to each Rating Agency (as evidenced in writing by each Rating Agency
that use of any such account as the Custodial Account or the Certificate Account
will not reduce the rating   assigned to any Class of Certificates by such Rating
Agency   below the   then-current   rating   assigned to such   Certificates   by such
Rating Agency).

         Eligible Master Servicing Compensation: With respect to any Distribution
Date, the lesser of (a) one-twelfth of 0.125% of the Stated Principal Balance of
the related Mortgage Loans immediately   preceding such Distribution Date and (b)
the sum of the   Servicing   Fee and all income   and gain on   amounts   held in the
Custodial    Account    and   the    Certificate    Account    and    payable    to   the
Certificateholders   with respect to such   Distribution   Date;   provided that for
purposes of this   definition the amount of the Servicing Fee will not be reduced
pursuant   to Section   7.02(a)   except as may be   required   pursuant   to the last
sentence of such Section.

        ERISA:   The Employee Retirement Income Security Act of 1974, as amended.

        Event of Default:   As defined in Section 7.01.

        Excess Cash Flow: With respect to any Distribution Date, an amount equal
to the sum of (A) the excess of (i) the Available   Distribution   Amount for that
Distribution Date over (ii) the sum of (a) the Interest   Distribution Amount for
that   Distribution   Date and (b) the   lesser   of (1) the   aggregate   Certificate
Principal   Balance of Class A Certificates and Class M Certificates   immediately
prior to such Distribution Date and (2) the Principal Remittance Amount for that
Distribution   Date to the extent   not   applied   to pay   interest   on the Class A
Certificates   and   Class M   Certificates   on   such   Distribution   Date,   (B) the
Overcollateralization   Reduction   Amount, if any, for that Distribution Date and
(C) any Yield   Maintenance   Agreement   Payments received by the Trustee for that
Distribution Date.

        Excess   Overcollateralization   Amount:   With respect to any Distribution
Date,   the   excess,   if any,   of (a) the   Overcollateralization   Amount   on such
Distribution   Date over (b) the Required   Overcollateralization   Amount for such
Distribution Date.

        Exchange Act:   The Securities Exchange Act of 1934, as amended.

        Expense Fee Rate:   With respect to any   Mortgage   Loan as of any date of
determination,   the sum of the   applicable   Servicing Fee Rate and the per annum
rate at which the applicable Subservicing Fee accrues.

        Fannie Mae:   Fannie   Mae, a   federally   chartered   and   privately   owned
corporation    organized   and   existing   under   the   Federal   National    Mortgage
Association Charter Act, or any successor thereto.

        FDIC:   Federal Deposit Insurance Corporation or any successor thereto.

        Final   Distribution   Date:   The   Distribution   Date on which   the   final
distribution   in respect of the   Certificates   will be made   pursuant to Section
9.01, which Final   Distribution   Date shall in no event be later than the end of
the 90-day liquidation period described in Section 9.02.

        Final Scheduled   Distribution   Date:   Solely for purposes of the face of
the Certificates,   as follows:   with respect to the Class A-1 Certificates,   the
Distribution   Date   occurring   in June 2026;   with   respect to the Class A-2 the
Distribution   Date   occurring   in April 2035;   and with respect to the Class A-3
Certificates   and each   Class of Class M   Certificates,   the   Distribution   Date
occurring in January 2036. No event of default under this   Agreement   will arise
or   become   applicable   solely by reason of the   failure   to retire   the   entire
Certificate   Principal   Balance of any Class of Class A Certificates   or Class M
Certificates on or before its Final Scheduled Distribution Date.

        Fitch:   Fitch Ratings, or its successors in interest.

        Foreclosure   Profits:   With respect to any Distribution   Date or related
Determination   Date and any Mortgage   Loan,   the excess,   if any, of Liquidation
Proceeds,   Insurance Proceeds and REO Proceeds (net of all amounts   reimbursable
therefrom   pursuant to Section   3.10(a)(ii)) in respect of each Mortgage Loan or
REO Property for which a Cash   Liquidation   or REO   Disposition   occurred in the
related   Prepayment   Period over the sum of the unpaid principal balance of such
Mortgage Loan or REO Property (determined, in the case of an REO Disposition, in
accordance   with Section 3.14) plus accrued and unpaid   interest at the Mortgage
Rate on such unpaid   principal   balance from the Due Date to which   interest was
last paid by the Mortgagor to the first day of the month   following the month in
which such Cash Liquidation or REO Disposition occurred.

        Form 10-K Certification:   As defined in Section 4.03(e).

        Freddie   Mac:   Freddie   Mac, a corporate   instrumentality   of the United
States created and existing under Title III of the Emergency Home Finance Act of
1970, as amended, or any successor thereto.

        Gross Margin:   With respect to each   adjustable-rate   Mortgage Loan, the
fixed   percentage   set forth in the related   Mortgage   Note and indicated on the
Mortgage Loan Schedule as the "NOTE   MARGIN,"   which   percentage is added to the
related   Index on each   Adjustment   Date to   determine   (subject   to rounding in
accordance   with the   related   Mortgage   Note,   the   Periodic   Cap,   the Maximum
Mortgage   Rate and the Minimum   Mortgage   Rate) the interest rate to be borne by
such Mortgage Loan until the next Adjustment Date.

        HUD:   The United States Department of Housing and Urban Development.

        Independent:   When used with respect to any specified Person, means such
a Person who (i) is in fact   independent of the Depositor,   the Master   Servicer
and the   Trustee,   or any   Affiliate   thereof,   (ii)   does not   have any   direct
financial interest or any material indirect financial interest in the Depositor,
the Master Servicer or the Trustee or in an Affiliate thereof,   and (iii) is not
connected with the Depositor,   the Master Servicer or the Trustee as an officer,
employee, promoter, underwriter, trustee, partner, director or person performing
similar functions.

        Index: With respect to any   adjustable-rate   Mortgage Loan and as to any
Adjustment   Date therefor,   the related index as stated in the related   Mortgage
Note.

        Initial   Certificate   Principal   Balance:   With respect to each Class of
Certificates   (other than the Class R Certificates),   the Certificate   Principal
Balance of such Class of Certificates as of the Closing Date as set forth in the
Preliminary Statement hereto.

        Insurance   Proceeds:   Proceeds   paid in   respect of the   Mortgage   Loans
pursuant to any Primary   Insurance Policy or any other related   insurance policy
covering a   Mortgage   Loan,   to the   extent   such   proceeds   are   payable to the
mortgagee   under the   Mortgage,   any   Subservicer,   the Master   Servicer   or the
Trustee and are not applied to the restoration of the related Mortgaged Property
or released to the Mortgagor in accordance   with the procedures   that the Master
Servicer would follow in servicing mortgage loans held for its own account.

        Interest   Accrual   Period:   With   respect   to the   Distribution   Date in
January   2006,   the period   commencing   the   Closing   Date and ending on the day
preceding   the   Distribution   Date in   January   2006,   and with   respect   to any
Distribution   Date   after the   Distribution   Date in   January   2006,   the period
commencing on the Distribution Date in the month immediately preceding the month
in which such   Distribution   Date   occurs and ending on the day   preceding   such
Distribution Date.

         Interest   Distribution   Amount:   For any Distribution   Date, the amounts
payable pursuant to Section 4.02(c)(i) and (ii).

        Interim Certification:   As defined in Section 2.02.

        Late   Collections:   With   respect   to any   Mortgage   Loan,   all   amounts
received during any Due Period,   whether as late payments of Monthly Payments or
as Insurance Proceeds,   Liquidation Proceeds or otherwise,   which represent late
payments or   collections   of Monthly   Payments due but delinquent for a previous
Due Period and not previously recovered.

        LIBOR: With respect to any Distribution Date, the arithmetic mean of the
London   interbank   offered rate quotations for one-month U.S.   Dollar   deposits,
expressed on a per annum basis, determined in accordance with Section 1.02.

        LIBOR   Business Day: Any day other than (i) a Saturday or Sunday or (ii)
a day   on   which   banking   institutions   in   London,   England   are   required   or
authorized by law to be closed.

        LIBOR Certificates:   Collectively,   the Class A Certificates and Class M
Certificates.

        LIBOR Rate Adjustment Date: With respect to each Distribution   Date, the
second LIBOR Business Day immediately   preceding the commencement of the related
Interest Accrual Period.

        Limited   Repurchase   Right Holder:   RFC Asset   Holdings II, Inc., or its
successor.

        Liquidation   Proceeds:   Amounts (other than Insurance Proceeds) received
by the Master   Servicer   in   connection   with the taking of an entire   Mortgaged
Property   by   exercise   of the power of   eminent   domain or   condemnation   or in
connection with the liquidation of a defaulted   Mortgage Loan through   trustee's
sale,   foreclosure   sale or   otherwise,   other than REO Proceeds and   Subsequent
Recoveries.

        Loan-to-Value   Ratio:   As of any   date,   the   fraction,   expressed   as a
percentage,   the   numerator   of which is the   current   principal   balance of the
related Mortgage Loan at the date of determination   and the denominator of which
is the Appraised Value of the related Mortgaged Property.

        Margin: The Class A-1 Margin,   Class A-2 Margin, Class A-3 Margin, Class
M-1 Margin,   Class M-2 Margin,   Class M-3   Margin,   Class M-4 Margin,   Class M-5
Margin,   Class M-6   Margin,   Class   M-7   Margin,   Class M-8   Margin or Class M-9
Margin, as applicable.

        Marker Rate:   With respect to the Class SB   Certificates or the REMIC II
Regular Interest SB-IO and any Distribution   Date, a per annum rate equal to two
(2) times the weighted average of the Uncertificated   REMIC I Pass-Through Rates
for REMIC I Regular Interest LT2 and REMIC I Regular Interest LT3.

        Master Servicer:   As defined in the preamble hereto.

        Maturity Date: With respect to each Class of   Certificates   representing
ownership of REMIC II Regular   Interests or REMIC I Regular   Interests issued by
each of REMIC I and REMIC II the   latest   possible   maturity   date,   solely   for
purposes of Section   1.860G-1(a)(4)(iii)   of the Treasury Regulations,   by which
the    Certificate    Principal    Balance   of   each   such   Class   of   Certificates
representing   a regular   interest   in the Trust   Fund   would be reduced to zero,
which   is,   for each such   regular   interest,   January   25,   2036,   which is the
Distribution   Date occurring in the month   following the last scheduled   monthly
payment of the Mortgage Loans.

        Maximum   Mortgage   Rate:   With respect to any   adjustable-rate   Mortgage
Loan,   the per annum rate   indicated on the Mortgage   Loan Schedule as the "NOTE
CEILING," which rate is the maximum interest rate that may be applicable to such
Mortgage Loan at any time during the life of such Mortgage Loan.

        MERS:   Mortgage   Electronic   Registration   Systems,   Inc., a corporation
organized and existing under the laws of the State of Delaware, or any successor
thereto.

        MERS(R)   System:    The   system   of   recording    transfers   of   Mortgages
electronically maintained by MERS.

        MIN: The Mortgage   Identification   Number for Mortgage Loans   registered
with MERS on the MERS(R) System.
        Minimum   Mortgage   Rate:   With respect to any   adjustable-rate   Mortgage
Loan,   a per annum rate equal to the greater of (i) the Note Margin and (ii) the
rate indicated on the Mortgage Loan Schedule as the "NOTE FLOOR," which rate may
be applicable to such Mortgage Loan at any time during the life of such Mortgage
Loan.

        Modified Mortgage Loan: Any Mortgage Loan that has been the subject of a
Servicing Modification.

        Modified Net Mortgage   Rate:   With respect to any Mortgage   Loan that is
the subject of a Servicing   Modification,   the Net Mortgage   Rate minus the rate
per annum by which the Mortgage Rate on such Mortgage Loan was reduced.

        MOM   Loan:   With   respect   to any   Mortgage   Loan,   MERS   acting   as the
mortgagee of such Mortgage   Loan,   solely as nominee for the   originator of such
Mortgage Loan and its successors and assigns, at the origination thereof.

        Monthly   Payment:   With respect to any Mortgage Loan   (including any REO
Property)   and the Due Date in any Due   Period,   the   payment of   principal   and
interest due thereon in accordance   with the   amortization   schedule at the time
applicable thereto (after adjustment, if any, for Curtailments and for Deficient
Valuations   occurring   prior to such Due Date but before any   adjustment to such
amortization   schedule   by   reason of any   bankruptcy,   other   than a   Deficient
Valuation,   or similar   proceeding or any   moratorium or similar waiver or grace
period and before any Servicing Modification that constitutes a reduction of the
interest rate on such Mortgage Loan).

        Moody's: Moody's Investors Service, Inc., or its successors in interest.

        Mortgage:   With respect to each Mortgage   Note,   the   mortgage,   deed of
trust or other   comparable   instrument   creating   a first or   junior   lien on an
estate in fee simple or leasehold   interest in real property securing a Mortgage
Note.

        Mortgage File: The mortgage   documents listed in Section 2.01 pertaining
to a particular Mortgage Loan and any additional   documents required to be added
to the Mortgage File pursuant to this Agreement.

        Mortgage Loans:   Such of the mortgage loans   transferred and assigned to
the Trustee   pursuant to Section 2.01 as from time to time are held or deemed to
be held as a part of the Trust Fund, the Mortgage Loans originally so held being
identified in the initial   Mortgage   Loan   Schedule,   and   Qualified   Substitute
Mortgage Loans held or deemed held as part of the Trust Fund including,   without
limitation,   each related   Mortgage   Note,   Mortgage   and Mortgage   File and all
rights appertaining thereto.

        Mortgage Loan Schedule:   The lists of the Mortgage Loans attached hereto
as Exhibit F (as amended   from time to time to reflect the addition of Qualified
Substitute   Mortgage   Loans),   which   lists   shall set   forth at a   minimum   the
following information as to each Mortgage Loan:

(i)           the Mortgage Loan identifying number ("RFC LOAN #");

(ii)          [reserved];

(iii)          the maturity of the Mortgage   Note   ("MATURITY   DATE," or "MATURITY
             DT");

(iv)          for the   adjustable-rate   Mortgage   Loans,   the Mortgage Rate as of
             origination ("ORIG RATE");

(v)           the Mortgage Rate as of the Cut-off Date ("CURR RATE");

(vi)          the Net Mortgage Rate as of the Cut-off Date ("CURR NET");

(vii)         the scheduled monthly payment of principal, if any, and interest as
             of the Cut-off Date ("ORIGINAL P & I" or "CURRENT P & I");

(viii)        the Cut-off Date Principal Balance ("PRINCIPAL BAL");

(ix)          the Loan-to-Value Ratio at origination ("LTV");

(x)           a code "T," "BT" or "CT" under the column "LN FEATURE,"   indicating
             that the Mortgage Loan is secured by a second or vacation residence
             (the absence of any such code means the Mortgage Loan is secured by
             a primary residence);

(xi)          a code "N"   under   the   column   "OCCP   CODE,"   indicating   that the
             Mortgage   Loan is secured by a non-owner   occupied   residence   (the
             absence of any such code means the   Mortgage   Loan is secured by an
             owner occupied residence);

(xii)         for the   adjustable-rate   Mortgage Loans, the Maximum Mortgage Rate
             ("NOTE CEILING");

(xiii)        for the   adjustable-rate   Mortgage Loans,   the maximum Net Mortgage
             Rate ("NET CEILING");

(xiv)         for the   adjustable-rate   Mortgage   Loans,   the Note Margin   ("NOTE
             MARGIN");

(xv)          for the   adjustable-rate   Mortgage Loans, the first Adjustment Date
             after the Cut-off Date ("NXT INT CHG DT");

(xvi)         for the adjustable-rate Mortgage Loans, the Periodic Cap ("PERIODIC
             DECR" or "PERIODIC INCR");

(xvii)        [reserved]; and

(xviii)       for   the   adjustable-rate   Mortgage   Loans,   the   rounding   of   the
             semi-annual   or   annual   adjustment   to the   Mortgage   Rate   ("NOTE
             METHOD").

        Such   schedules may consist of multiple   reports that   collectively   set
forth all of the information required.

        Mortgage   Note:   The   originally   executed   note or   other   evidence   of
indebtedness   evidencing the   indebtedness of a Mortgagor under a Mortgage Loan,
together with any modification thereto.

        Mortgage   Rate:   With respect to any Mortgage   Loan,   the interest   rate
borne by the related   Mortgage   Note, or any   modification   thereto other than a
Servicing Modification.   The Mortgage Rate on the adjustable-rate Mortgage Loans
will   adjust on each   Adjustment   Date to equal the sum   (rounded to the nearest
multiple of one-eighth of one percent   (0.125%) or up to the nearest   one-eighth
of one percent,   which are   indicated by a "U" on the   Mortgage   Loan   Schedule,
except in the case of the adjustable-rate   Mortgage Loans indicated by an "X" on
the Mortgage Loan   Schedule   under the heading   "NOTE   METHOD"),   of the related
Index plus the Note Margin, in each case subject to the applicable Periodic Cap,
Maximum Mortgage Rate and Minimum Mortgage Rate.

        Mortgaged   Property:   The underlying   real property   securing a Mortgage
Loan.

        Mortgagor:   The obligor on a Mortgage Note.

        Net Mortgage   Rate:   With respect to any Mortgage Loan as of any date of
determination,   a per annum rate equal to the   Mortgage   Rate for such   Mortgage
Loan as of such date minus the related Expense Fee Rate.

        Net WAC Cap Rate: With respect to any Distribution   Date, the product of
(i) a per annum rate equal to the   weighted   average of the Net   Mortgage   Rates
(or, if   applicable,   the Modified   Net   Mortgage   Rates) using the Net Mortgage
Rates in effect for the Monthly   Payments due on such Mortgage   Loans during the
related Due Period,   weighted on the basis of the   respective   Stated   Principal
Balances   thereof   for such   Distribution   Date and (ii) a fraction   equal to 30
divided by the actual number of days in the related Interest Accrual Period.

        Non-United States Person:   Any Person other than a United States Person.

        Nonrecoverable   Advance:   Any Advance   previously made or proposed to be
made by the Master   Servicer or Subservicer in respect of a Mortgage Loan (other
than a Deleted   Mortgage   Loan) which,   in the good faith judgment of the Master
Servicer,   will not,   or,   in the case of a   proposed   Advance,   would   not,   be
ultimately   recoverable   by the Master   Servicer from related Late   Collections,
Insurance Proceeds, Liquidation Proceeds or REO Proceeds. To the extent that any
Mortgagor   is not   obligated   under the   related   Mortgage   documents   to pay or
reimburse   any   portion of any   Servicing   Advances   that are   outstanding   with
respect   to the   related   Mortgage   Loan as a result of a   modification   of such
Mortgage Loan by the Master   Servicer,   which forgives   amounts which the Master
Servicer   or   Subservicer   had   previously   advanced,   and the   Master   Servicer
determines that no other source of payment or reimbursement for such advances is
available to it, such Servicing   Advances   shall be deemed to be   Nonrecoverable
Advances.   The   determination   by   the   Master   Servicer   that   it   has   made   a
Nonrecoverable   Advance   shall be   evidenced   by a   certificate   of a   Servicing
Officer,   Responsible   Officer or Vice   President   or its   equivalent   or senior
officer of the Master Servicer, delivered to the Depositor, the Trustee, and the
Master Servicer setting forth such determination,   which shall include any other
information   or   reports   obtained   by the   Master   Servicer   such   as   property
operating   statements,   rent rolls,   property inspection reports and engineering
reports,   which may support such determinations.   Notwithstanding the above, the
Trustee shall be entitled to rely upon any   determination by the Master Servicer
that   any   Advance   previously   made is a   Nonrecoverable   Advance   or that   any
proposed Advance, if made, would constitute a Nonrecoverable Advance.

        Nonsubserviced   Mortgage   Loan:   Any Mortgage   Loan that, at the time of
reference thereto, is not subject to a Subservicing Agreement.

        Note Margin:   With respect to each   adjustable-rate   Mortgage   Loan, the
fixed   percentage   set forth in the related   Mortgage   Note and indicated on the
Mortgage Loan Schedule as the "NOTE   MARGIN,"   which   percentage is added to the
Index on each   Adjustment   Date to determine   (subject to rounding in accordance
with the related   Mortgage Note, the Periodic Cap, the Maximum Mortgage Rate and
the Minimum   Mortgage   Rate) the interest rate to be borne by such Mortgage Loan
until the next Adjustment Date.

        Notional Amount:   With respect to the Class SB Certificates or the REMIC
II Regular   Interest   SB-IO,   immediately   prior to any   Distribution   Date, the
aggregate   of the   Uncertificated   Principal   Balances   of the   REMIC I   Regular
Interests.

        Officers'   Certificate:   A   certificate   signed by the   Chairman   of the
Board,   the President,   a Vice President,   Assistant Vice   President,   Director,
Managing Director,   the Treasurer,   the Secretary,   an Assistant Treasurer or an
Assistant Secretary of the Depositor or the Master Servicer, as the case may be,
and delivered to the Trustee, as required by this Agreement.

        Opinion of   Counsel:   A written   opinion of   counsel   acceptable   to the
Trustee   and the   Master   Servicer   and which   counsel   may be   counsel   for the
Depositor   or the Master   Servicer,   provided   that any   opinion of counsel   (i)
referred to in the definition of "Disqualified Organization" or (ii) relating to
the qualification of any REMIC hereunder as a REMIC or compliance with the REMIC
Provisions   must,   unless   otherwise   specified,   be an opinion   of   Independent
counsel.

        Optional   Termination   Date: Any Distribution Date on or after which the
Stated   Principal   Balance (after giving effect to   distributions   to be made on
such Distribution Date) of the Mortgage Loans is less than 10.00% of the Cut-off
Date Balance.

        Outstanding   Mortgage   Loan:   With   respect   to the Due   Date in any Due
Period,   a Mortgage Loan (including an REO Property) that was not the subject of
a Principal Prepayment in Full, Cash Liquidation or REO Disposition and that was
not   purchased,   deleted or   substituted   for prior to such Due Date pursuant to
Section 2.02, 2.03, 2.04 or 4.07.

        Overcollateralization Amount: With respect to any Distribution Date, the
excess,   if any, of (a) the aggregate Stated   Principal   Balance of the Mortgage
Loans   before   giving   effect to   distributions   of principal to be made on such
Distribution   Date over (b) the aggregate   Certificate   Principal Balance of the
Class A Certificates and Class M Certificates immediately prior to such date.

        Overcollateralization Floor: An amount equal to the product of 0.50% and
the Cut-off Date Balance.

        Overcollateralization   Increase Amount: With respect to any Distribution
Date,   the lesser of (a)   Excess   Cash Flow for that   Distribution   Date (to the
extent not used to cover the amounts   described in clauses (b)(iv) and (b)(v) of
the definition of Principal   Distribution   Amount as of such Distribution   Date)
and (b) the   excess of (1) the   Required   Overcollateralization   Amount for such
Distribution    Date   over   (2)   the    Overcollateralization    Amount    for   such
Distribution Date.
        Overcollateralization Reduction Amount: With respect to any Distribution
Date on which the Excess   Overcollateralization   Amount is,   after   taking   into
account all other   distributions to be made on such Distribution   Date,   greater
than zero,   the   Overcollateralization   Reduction   Amount   shall be equal to the
lesser of (i) the Excess Overcollateralization Amount for that Distribution Date
and (ii) the Principal Remittance Amount on such Distribution Date.

        Ownership   Interest:   With respect to any Certificate,   any ownership or
security   interest   in   such    Certificate,    including   any   interest   in   such
Certificate as the Holder thereof and any other interest therein, whether direct
or indirect, legal or beneficial, as owner or as pledgee.

        Pass-Through   Rate:   With respect to each Class of Class A   Certificates
and Class M Certificates and any Distribution Date, the least of (i) a per annum
rate equal to LIBOR plus the related   Margin for such   Distribution   Date,   (ii)
14.000% per annum and (iii) the Net WAC Cap Rate for such Distribution Date.

        With respect to the Class SB Certificates and any   Distribution   Date or
the REMIC II Regular   Interest   SB-IO,   a rate per annum equal to the percentage
equivalent   of a   fraction,   the   numerator   of which is the sum of the   amounts
calculated   pursuant to clauses (i) through (iii) below,   and the denominator of
which is the aggregate   principal balance of the REMIC I Regular Interests.   For
purposes of calculating the   Pass-Through   Rate for the Class SB Certificates or
the REMIC II Regular   Interest   SB-IO,   the numerator is equal to the sum of the
following components:

               (i) the   Uncertificated   Pass-Through   Rate for   REMIC I   Regular
         Interest LT1 minus the related Marker Rate, applied to a notional amount
        equal   to the   Uncertificated   Principal   Balance   of   REMIC   I   Regular
        Interest LT1;

               (ii) the   Uncertificated   Pass-Through   Rate for   REMIC I Regular
        Interest LT2 minus the related Marker Rate, applied to a notional amount
        equal   to the   Uncertificated   Principal   Balance   of   REMIC   I   Regular
        Interest LT2; and

               (iii) the   Uncertificated   Pass-Through   Rate for REMIC I Regular
        Interest LT4 minus twice the related Marker Rate,   applied to a notional
        amount equal to the Uncertificated   Principal Balance of REMIC I Regular
        Interest LT4.

        Paying Agent:   U.S. Bank National   Association   or any successor   Paying
Agent appointed by the Trustee.

        Percentage Interest:   With respect to any Class A Certificate or Class M
Certificate,   the undivided   percentage   ownership interest in the related Class
evidenced by such   Certificate,   which   percentage   ownership   interest shall be
equal to the   Initial   Certificate   Principal   Balance   thereof   divided   by the
aggregate   Initial   Certificate   Principal Balance of all of the Certificates of
the same Class.   The Percentage   Interest with respect to a Class SB Certificate
or Class R Certificate shall be stated on the face thereof.

        Periodic Cap: With respect to each   adjustable-rate   Mortgage   Loan, the
periodic   rate cap that   limits the   increase   or the   decrease   of the   related
Mortgage   Rate on any   Adjustment   Date   pursuant   to the   terms of the   related
Mortgage Note.

        Permitted Investments:   One or more of the following:

        (i)     obligations   of or guaranteed as to principal and interest by the
                United States or any agency or instrumentality   thereof when such
               obligations are backed by the full faith and credit of the United
               States;

        (ii)    repurchase   agreements   on   obligations   specified   in clause (i)
                maturing   not more   than one month   from the date of   acquisition
               thereof,   provided   that the unsecured   obligations   of the party
               agreeing to repurchase such   obligations are at the time rated by
                each Rating Agency in its highest short-term rating available;

        (iii)   federal funds,   certificates of deposit,   demand   deposits,   time
               deposits   and   bankers'   acceptances   (which   shall   each have an
               original   maturity   of not more than 90 days and,   in the case of
               bankers' acceptances, shall in no event have an original maturity
               of more   than 365 days or a   remaining   maturity   of more than 30
               days) denominated in United States dollars of any U.S. depository
               institution or trust company   incorporated   under the laws of the
               United States or any state thereof or of any domestic branch of a
               foreign   depository   institution or trust company;   provided that
               the debt   obligations   of such   depository   institution   or trust
               company   at the date of   acquisition   thereof   have been rated by
               each Rating Agency in its highest   short-term   rating   available;
               and,   provided   further   that,   if the original   maturity of such
               short-term    obligations   of   a   domestic   branch   of   a   foreign
               depository institution or trust company shall exceed 30 days, the
               short-term   rating of such institution   shall be A-1+ in the case
               of Standard & Poor's if Standard & Poor's is a Rating Agency;

        (iv)    commercial paper and demand notes (having original   maturities of
               not more than 365 days) of any corporation incorporated under the
               laws of the United   States or any state thereof which on the date
               of   acquisition   has been   rated   by each   Rating   Agency   in its
               highest    short   term   rating    available;    provided   that   such
               commercial paper and demand notes shall have a remaining maturity
               of not more than 30 days;

        (v)     a money market fund or a qualified   investment fund rated by each
               Rating Agency in its highest   long-term   rating   available (which
               may be managed by the Trustee or one of its Affiliates); and

        (vi)    other   obligations   or   securities   that are   acceptable   to each
               Rating   Agency as a Permitted   Investment   hereunder and will not
               reduce the rating   assigned to any Class of   Certificates by such
               Rating   Agency   below the   then-current   rating   assigned to such
               Certificates   as of the Closing   Date by such Rating   Agency,   as
               evidenced in writing;

provided,   however,   that no   instrument   shall be a Permitted   Investment if it
represents,   either (1) the right to receive only interest payments with respect
to the underlying debt instrument or (2) the right to receive both principal and
interest   payments derived from   obligations   underlying such instrument and the
principal and interest payments with respect to such instrument   provide a yield
to maturity greater than 120% of the yield to maturity at par of such underlying
obligations.   References   herein to the highest   rating   available   on unsecured
long-term debt shall mean AAA in the case of Standard & Poor's and Fitch and Aaa
in the case of Moody's,   and for   purposes   of this   Agreement,   any   references
herein   to the   highest   rating   available   on   unsecured   commercial   paper and
short-term   debt   obligations   shall   mean   the   following:   A-1 in the   case of
Standard   &   Poor's,   P-1 in the case of   Moody's   and F-1 in the case of Fitch;
provided,   however,   that any   Permitted   Investment   that is a short-term   debt
obligation rated A-1 by Standard & Poor's must satisfy the following   additional
conditions: (i) the total amount of debt from A-1 issuers must be limited to the
investment of monthly principal and interest payments (assuming fully amortizing
collateral);   (ii) the total amount of A-1   investments   must not represent more
than 20% of the   aggregate   outstanding   Certificate   Principal   Balance   of the
Certificates and each investment must not mature beyond 30 days; (iii) the terms
of the debt must have a   predetermined   fixed dollar   amount of principal due at
maturity that cannot vary; and (iv) if the investments   may be liquidated   prior
to their maturity or are being relied on to meet a certain yield,   interest must
be tied to a single   interest rate index plus a single fixed spread (if any) and
must move   proportionately   with that index.   Any   Permitted   Investment   may be
purchased by or through the Trustee or its Affiliates.

        Permitted   Transferee:   Any Transferee of a Class R   Certificate,   other
than a Disqualified Organization or Non-United States Person.

        Person:    Any   individual,    corporation,    limited   liability   company,
partnership,    joint    venture,    association,    joint-stock    company,    trust,
unincorporated organization or government or any agency or political subdivision
thereof.

        Prepayment   Assumption:   With   respect to the Class A   Certificates   and
Class M Certificates,   the prepayment   assumption to be used for determining the
accrual of original   issue   discount   and   premium   and market   discount on such
Certificates   for federal   income tax   purposes,   which (a) with   respect to the
fixed-rate   Mortgage Loans,   assumes a constant   prepayment rate of one-tenth of
23% per annum of the then outstanding Stated Principal Balance of the fixed-rate
Mortgage   Loans in the   first   month of the life of such   Mortgage   Loans and an
additional   one-tenth of 23% per annum in each month   thereafter until the tenth
month, and beginning in the tenth month and in each month thereafter   during the
life of the fixed-rate   Mortgage   Loans, a constant   prepayment   rate of 23% per
annum   each   month   ("23%   HEP")   and (b) with   respect   to the   adjustable-rate
Mortgage Loans assumes a prepayment   assumption of 2% of the constant prepayment
rate in month one,   increasing by approximately   2.545% from month 2 until month
12, a   constant   prepayment   rate of 30% from   month 12 to month 22, a   constant
prepayment rate of 50% from month 23 to month 27, and a constant prepayment rate
of 35%   thereafter,   used for determining the accrual of original issue discount
and   premium   and   market   discount   on the   Class A   Certificates   and   Class M
Certificates   for federal   income tax   purposes.   The constant   prepayment   rate
assumes that the stated   percentage of the outstanding   Stated Principal Balance
of the adjustable-rate Mortgage Loans is prepaid over the course of a year.

        Prepayment Interest Shortfall: With respect to any Distribution Date and
any Mortgage Loan (other than a Mortgage Loan relating to an REO Property)   that
was the   subject   of (a) a   Principal   Prepayment   in Full   during   the   related
Prepayment   Period, an amount equal to the excess of one month's interest at the
related   Net   Mortgage   Rate (or   Modified   Net   Mortgage   Rate in the case of a
Modified   Mortgage Loan) on the Stated   Principal   Balance of such Mortgage Loan
over the amount of   interest   (adjusted   to the related   Net   Mortgage   Rate (or
Modified Net Mortgage Rate in the case of a Modified Mortgage Loan)) paid by the
Mortgagor for such Prepayment Period to the date of such Principal Prepayment in
Full or (b) a Curtailment   during the prior calendar   month,   an amount equal to
one month's   interest at the related Net Mortgage Rate (or Modified Net Mortgage
Rate in the case of a Modified Mortgage Loan) on the amount of such Curtailment.

        Prepayment   Period:   With respect to any Distribution Date, the calendar
month preceding the month of distribution.

        Primary   Insurance   Policy:   Each   primary   policy of mortgage   guaranty
insurance as indicated by a numeric code on the Mortgage   Loan Schedule with the
exception of code "A23," "A34" or "A96" under the column "MI CO CODE."

        Principal   Distribution   Amount:   With respect to any Distribution Date,
the   lesser of (a) the excess of (x) the sum of (A) the   Available   Distribution
Amount and (B) with respect to clauses (b)(v) and (vi) below,   Yield Maintenance
Agreement Payments,   over (y) the Interest   Distribution Amount, and (b) the sum
of:

(i)         the principal   portion of each Monthly   Payment   received or Advanced
           with respect to the related Due Period on each   Outstanding   Mortgage
           Loan;

(ii)        the Stated Principal Balance of any Mortgage Loan repurchased   during
           the related   Prepayment Period (or deemed to have been so repurchased
           in accordance with Section   3.07(b))   pursuant to Section 2.02, 2.03,
           2.04 or   4.07   and   the   amount   of any   shortfall   deposited   in the
           Custodial   Account in connection   with the   substitution of a Deleted
           Mortgage   Loan   pursuant   to Section   2.03 or 2.04 during the related
           Prepayment Period;

(iii)       the principal   portion of all other   unscheduled   collections,   other
           than Subsequent Recoveries, on the Mortgage Loans (including, without
           limitation,   Principal Prepayments in Full,   Curtailments,   Insurance
           Proceeds,   Liquidation Proceeds and REO Proceeds) received during the
           related Prepayment Period (or deemed to have been so received) to the
           extent   applied by the Master   Servicer as recoveries of principal of
           the Mortgage Loans pursuant to Section 3.14;

(iv)        the lesser of (1) Subsequent   Recoveries for such   Distribution   Date
           and (2) the principal portion of any Realized Losses allocated to any
            Class of   Certificates   on a prior   Distribution   Date and   remaining
           unpaid;

(v)         the lesser of (1) the Excess Cash Flow for such Distribution Date (to
           the extent not used   pursuant   to clause (iv) of this   definition   on
           such Distribution Date) and (2) the principal portion of any Realized
           Losses   incurred   (or deemed to have been   incurred)   on any Mortgage
           Loans in the calendar month preceding such Distribution Date; and

(vi)        the lesser of (1) the Excess Cash Flow for that Distribution Date (to
           the   extent   not   used   pursuant   to   clauses   (iv)   and   (v) of this
           definition     on     such     Distribution     Date)     and     (2)    the
           Overcollateralization Increase Amount for such Distribution Date;
minus

(vii)       (A) the amount of any Overcollateralization Reduction Amount for such
           Distribution    Date   and   (B)   the    amount   of   any    Capitalization
           Reimbursement Amount for such Distribution Date.

        Principal   Prepayment:   Any payment of principal or other   recovery on a
Mortgage Loan,   including a recovery that takes the form of Liquidation Proceeds
or Insurance   Proceeds,   which is received in advance of its   scheduled Due Date
and is not   accompanied   by an   amount   as to   interest   representing   scheduled
interest   on such   payment   due on any   date or dates   in any   month   or   months
subsequent to the month of prepayment.

        Principal   Prepayment   in   Full:   Any   Principal   Prepayment   made   by a
Mortgagor of the entire principal balance of a Mortgage Loan.

        Principal   Remittance Amount: With respect to any Distribution Date, all
amounts described in clauses (b)(i) through (iii) of the definition of Principal
Distribution Amount for that Distribution Date.

        Program   Guide:   The   AlterNet   Seller   Guide as   incorporated   into the
Residential    Funding   Seller   Guide   for   mortgage    collateral    sellers   that
participate in Residential   Funding's AlterNet Mortgage Program, and Residential
Funding's   Servicing   Guide   and   any   other   subservicing    arrangements   which
Residential   Funding has arranged to   accommodate   the servicing of the Mortgage
Loans and in each case all   supplements   and   amendments   thereto   published   by
Residential Funding.

        Purchase   Price:   With   respect to any Mortgage   Loan (or REO   Property)
required to be or   otherwise   purchased   on any date   pursuant to Section   2.02,
2.03,   2.04 or   4.07,   an   amount   equal   to the sum of (i)   100% of the   Stated
Principal Balance thereof plus the principal portion of any related unreimbursed
Advances and (ii) unpaid   accrued   interest at either (a) the Adjusted   Mortgage
Rate (or   Modified Net Mortgage   Rate in the case of a Modified   Mortgage   Loan)
plus the rate per annum at which the Servicing Fee is calculated,   or (b) in the
case of a purchase   made by the Master   Servicer,   at the Net Mortgage   Rate (or
Modified Net Mortgage   Rate in the case of a Modified   Mortgage   Loan),   in each
case on the   Stated   Principal   Balance   thereof   to the   first day of the month
following   the month of purchase   from the Due Date to which   interest   was last
paid by the   Mortgagor.   With   respect to any   Mortgage   Loan (or REO   Property)
required to be or otherwise   purchased on any date   pursuant to Section 4.08, an
amount   equal to the greater of (i) the sum of (a) 100% of the Stated   Principal
Balance thereof plus the principal portion of any related unreimbursed   Advances
of such   Mortgage   Loan (or REO   Property)   and (b) unpaid   accrued   interest at
either (1) the Adjusted Mortgage Rate (or Modified Net Mortgage Rate in the case
of a Modified   Mortgage Loan) plus the rate per annum at which the Servicing Fee
is calculated,   or (2) in the case of a purchase made by the Master Servicer, at
the Net Mortgage   Rate (or Modified Net Mortgage   Rate in the case of a Modified
Mortgage   Loan),   in each case on the Stated   Principal   Balance   thereof to the
first day of the month   following   the   month of   purchase   from the Due Date to
which interest was last paid by the Mortgagor, and (ii) the fair market value of
such Mortgage Loan (or REO Property).

        Qualified   Substitute   Mortgage   Loan: A Mortgage   Loan   substituted   by
Residential   Funding or the Depositor for a Deleted Mortgage Loan which must, on
the   date   of   such   substitution,   as   confirmed   in an   Officers'   Certificate
delivered to the   Trustee,   (i) have an   outstanding   principal   balance,   after
deduction of the   principal   portion of the monthly   payment due in the month of
substitution   (or in the case of a   substitution   of more than one Mortgage Loan
for a Deleted Mortgage Loan, an aggregate outstanding   principal balance,   after
such deduction),   not in excess of the Stated   Principal   Balance of the Deleted
Mortgage   Loan (the   amount of any   shortfall   to be   deposited   by   Residential
Funding,   in the Custodial   Account in the month of   substitution);   (ii) have a
Mortgage   Rate and a Net   Mortgage   Rate no lower   than and not more than 1% per
annum higher than the Mortgage Rate and Net Mortgage Rate, respectively,   of the
Deleted Mortgage Loan as of the date of substitution; (iii) have a Loan-to-Value
Ratio at the time of   substitution   no higher than that of the Deleted   Mortgage
Loan at the time of substitution;   (iv) have a remaining term to stated maturity
not   greater   than (and not more than one year less   than)   that of the   Deleted
Mortgage   Loan;   (v) comply with each   representation   and warranty set forth in
Sections 2.03 and 2.04 hereof and Section 4 of the Assignment   Agreement   (other
than the   representations   and   warranties set forth therein with respect to the
number of loans (including the related   percentage) in excess of zero which meet
or do not meet a specified   criteria);   (vi) not be 30 days or more   Delinquent;
(vii) not be subject to the   requirements of HOEPA (as defined in the Assignment
Agreement); (viii) have a policy of title insurance, in the form and amount that
is in material   compliance with the Program Guide,   that was effective as of the
closing of such Mortgage   Loan, is valid and binding,   and remains in full force
and effect,   unless the Mortgage   Property is located in the State of Iowa where
an attorney's   certificate   has been provided as described in the Program Guide;
(ix) if the Deleted Loan is not a Balloon Loan,   not be a Balloon Loan; (x) with
respect to   adjustable   rate Mortgage   Loans,   have a Mortgage Rate that adjusts
with the same   frequency   and based upon the same   Index as that of the   Deleted
Mortgage Loan; (xi) with respect to adjustable rate Mortgage Loans,   have a Note
Margin not less than that of the Deleted   Mortgage   Loan;   (xii) with respect to
adjustable rate Mortgage   Loans,   have a Periodic Rate Cap that is equal to that
of the   Deleted   Mortgage   Loan;   and (xiii)   with   respect to   adjustable   rate
Mortgage   Loans,   have a next   Adjustment Date no later than that of the Deleted
Mortgage Loan.

        Rating Agency: Each of Standard & Poor's and Moody's. If any agency or a
successor is no longer in existence,   "Rating Agency" shall be such   statistical
credit rating agency, or other comparable   Person,   designated by the Depositor,
notice   of   which   designation   shall be given   to the   Trustee   and the   Master
Servicer.

        Realized   Loss:   With respect to each Mortgage Loan (or REO Property) as
to which a Cash Liquidation or REO Disposition has occurred, an amount (not less
than zero) equal to (i) the Stated   Principal   Balance of the Mortgage   Loan (or
REO Property) as of the date of Cash Liquidation or REO   Disposition,   plus (ii)
interest   (and REO Imputed   Interest,   if any) at the Net Mortgage Rate from the
Due Date as to which interest was last paid or advanced to Certificateholders up
to the last day of the month in which the Cash   Liquidation (or REO Disposition)
occurred on the Stated Principal Balance of such Mortgage Loan (or REO Property)
outstanding   during each Due Period that such interest was not paid or advanced,
minus (iii) the proceeds,   if any,   received during the month in which such Cash
Liquidation (or REO Disposition)   occurred,   to the extent applied as recoveries
of interest at the Net Mortgage Rate and to principal of the Mortgage   Loan, net
of the portion   thereof   reimbursable   to the Master Servicer or any Subservicer
with respect to related   Advances,   Servicing   Advances or other   expenses as to
which the Master Servicer or Subservicer is entitled to reimbursement thereunder
but which have not been   previously   reimbursed.   With respect to each   Mortgage
Loan which is the   subject of a   Servicing   Modification,   (a) (1) the amount by
which the interest portion of a Monthly Payment or the principal balance of such
Mortgage   Loan was reduced or (2) the sum of any other   amounts   owing under the
Mortgage Loan that were forgiven and that constitute Servicing Advances that are
reimbursable   to the Master   Servicer or a Subservicer,   and (b) any such amount
with   respect to a Monthly   Payment that was or would have been due in the month
immediately   following the month in which a Principal Prepayment or the Purchase
Price of such Mortgage Loan is received or is deemed to have been received. With
respect   to each   Mortgage   Loan which has   become   the   subject of a   Deficient
Valuation,   the   difference   between the principal   balance of the Mortgage Loan
outstanding   immediately   prior to such   Deficient   Valuation   and the principal
balance of the Mortgage Loan as reduced by the Deficient Valuation. With respect
to each Mortgage   Loan which has become the object of a Debt Service   Reduction,
the amount of such Debt Service Reduction.   Notwithstanding the above, neither a
Deficient Valuation nor a Debt Service Reduction shall be deemed a Realized Loss
hereunder   so long as the Master   Servicer   has   notified the Trustee in writing
that the Master   Servicer is diligently   pursuing any remedies that may exist in
connection   with the   representations   and warranties made regarding the related
Mortgage   Loan and either (A) the related   Mortgage   Loan is not in default with
regard to payments due   thereunder or (B)   delinquent   payments of principal and
interest   under the related   Mortgage   Loan and any   premiums on any   applicable
primary hazard   insurance   policy and any related escrow   payments in respect of
such Mortgage Loan are being advanced on a current basis by the Master   Servicer
or a   Subservicer,   in either case   without   giving   effect to any Debt   Service
Reduction.

        Realized   Losses   allocated   to   the   Class   SB   Certificates   shall   be
allocated   first to the REMIC II   Regular   Interest   SB-IO in   reduction   of the
accrued but unpaid interest thereon until such accrued and unpaid interest shall
have been   reduced   to zero and then to the REMIC II Regular   Interest   SB-PO in
reduction of the Principal Balance thereof.

        To the extent the Master Servicer   receives   Subsequent   Recoveries with
respect to any Mortgage   Loan,   the amount of the Realized   Loss with respect to
that Mortgage Loan will be reduced to the extent such   recoveries are applied to
reduce the   Certificate   Principal   Balance of any Class of   Certificates on any
Distribution Date.

        Record   Date:   With   respect   to each   Distribution   Date and the   LIBOR
Certificates,   the Business Day immediately   preceding such   Distribution   Date.
With   respect to each   Distribution   Date and the   Certificates   (other than the
LIBOR Certificates), the close of business on the last Business Day of the month
next preceding the month in which the related   Distribution Date occurs,   except
in the case of the first Record Date which shall be the Closing Date.

        Reference Bank Rate:   As defined in Section 1.02.

        Regular Certificates: The Class A Certificates, Class M Certificates and
Class SB Certificates.

        Relief Act:   The Servicemembers Civil Relief Act, as amended.

        Relief   Act   Shortfalls:   Interest   shortfalls   on   the   Mortgage   Loans
resulting from the Relief Act or similar legislation or regulations.

        REMIC: A "real estate mortgage investment conduit" within the meaning of
Section 860D of the Code. As used herein, the term "REMIC" shall mean REMIC I or
REMIC II.

        REMIC   Administrator:   Residential Funding   Corporation.   If Residential
Funding   Corporation is found by a court of competent   jurisdiction to no longer
be able to fulfill its obligations as REMIC   Administrator   under this Agreement
the Master Servicer or Trustee acting as successor Master Servicer shall appoint
a   successor    REMIC    Administrator,    subject   to    assumption   of   the   REMIC
Administrator obligations under this Agreement.

        REMIC I: The segregated   pool of assets subject   hereto,   constituting a
portion of the primary trust created   hereby and to be   administered   hereunder,
exclusive   of the   Yield   Maintenance   Agreement,   which   is not an asset of any
REMIC, with respect to which a separate REMIC election is to be made, consisting
of:

               (i) the Mortgage Loans and the related Mortgage Files;

                (ii) all payments on and   collections   in respect of the Mortgage
        Loans due after the Cut-off Date (other than Monthly Payments due in the
        month of the   Cut-off   Date) as shall   be on   deposit   in the   Custodial
        Account or in the Certificate Account and identified as belonging to the
        Trust Fund;

               (iii)   property   which secured a Mortgage Loan and which has been
        acquired for the benefit of the   Certificateholders   by   foreclosure   or
        deed in lieu of foreclosure;

               (iv) the hazard insurance policies and Primary Insurance Policies
        pertaining to the Mortgage Loans, if any; and

               (v) all proceeds of clauses (i) through (iv) above.

        REMIC I Distribution   Amount:   For any Distribution   Date, the Available
Distribution   Amount shall be distributed   to the REMIC I Regular   Interests and
the Class R-I Certificates in the following amounts and priority:

               (i) to the extent of the Available   Distribution Amount, to REMIC
II as the holder of REMIC I Regular   Interests   LT1, LT2, LT3 and LT4, pro rata,
in an   amount   equal   to (A)   their   Uncertificated   Accrued   Interest   for such
Distribution Date, plus (B) any amounts in respect thereof remaining unpaid from
previous Distribution Dates; and

               (ii) to the extent of the Available Distribution Amount remaining
after the   distributions   made pursuant to clause (i) above,   to REMIC II as the
holder of the REMIC I Regular Interests, in an amount equal to:

                      (A) in respect of the REMIC I Regular Interests LT2, LT3
and LT4,
their respective Principal Distribution Amounts;

                      (B) in respect of the REMIC I Regular Interest LT1 any
remainder
until the Uncertificated Principal Balance thereof is reduced to zero;

                      (C) any remainder in respect of the REMIC I Regular
Interests LT2,
LT3 and LT4, pro rata   according to their   respective   Uncertificated   Principal
Balances   as reduced by the   distributions   deemed   made   pursuant to (A) above,
until their respective   Uncertificated   Principal   Balances are reduced to zero;
and

               (iii)   any   remaining   amounts   to the   Holders   of the Class R-I
Certificates.

        REMIC I Principal   Reduction   Amounts:   For any   Distribution   Date, the
amounts by which the principal   balances of the REMIC I Regular   Interests   LT1,
LT2, LT3 and LT4, respectively, will be reduced on such Distribution Date by the
allocation of Realized Losses and the   distribution of principal,   determined as
follows:

        For purposes of the succeeding formulas the following symbols shall have
the meanings set forth below:

        Y1 = the aggregate principal balance of the REMIC I Regular Interest LT1
after distributions on the prior Distribution Date.

        Y2 = the   principal   balance of the REMIC I Regular   Interest   LT2 after
distributions on the prior Distribution Date.

        Y3 = the   principal   balance of the REMIC I Regular   Interest   LT3 after
distributions on the prior Distribution Date.

        Y4 = the   principal   balance of the REMIC I Regular   Interest   LT4 after
distributions on the prior Distribution Date (note: Y3 = Y4).

        AY1 = the REMIC I Regular Interest LT1 Principal Reduction Amount.

        AY2 = the REMIC I Regular Interest LT2 Principal Reduction Amount.

        AY3 = the REMIC I Regular Interest LT3 Principal Reduction Amount.

        AY4 = the REMIC I Regular Interest LT4 Principal Reduction Amount.

        P0 = the aggregate   principal   balance of the REMIC I Regular   Interests
LT1, LT2, LT3 and LT4 after   distributions and the allocation of Realized Losses
on the prior Distribution Date.

        P1 = the aggregate   principal   balance of the REMIC I Regular   Interests
LT1, LT2, LT3 and LT4 after   distributions and the allocation of Realized Losses
to be made on such Distribution Date.

        AP = P0 - P1 = the aggregate of the REMIC I Regular   Interests LT1, LT2,
LT3 and LT4 Principal Reduction Amounts.

               =the aggregate of the principal   portions of Realized Losses to be
allocated to, and the principal distributions to be made on, the Certificates on
such Distribution   Date (including   distributions of accrued and unpaid interest
on the Class SB Certificates for prior Distribution Dates).

        R0 = the Net WAC Cap Rate (stated as a monthly rate) after giving effect
to amounts   distributed and Realized Losses allocated on the prior   Distribution
Date.

        R1 = the Net WAC Cap Rate (stated as a monthly rate) after giving effect
to   amounts   to be   distributed   and   Realized   Losses to be   allocated   on such
Distribution Date.

        a = (Y2 + Y3)/P0.   The initial value of a on the Closing Date for use on
the first Distribution Date shall be 0.0001.

        a0 = the lesser of (A) the sum for all   Classes of   Certificates,   other
than the Class SB Certificates, of the product for each Class of (i) the monthly
interest   rate (as limited by the REMIC Net WAC Rate,   if   applicable)   for such
Class applicable for distributions to be made on such Distribution Date and (ii)
the aggregate   Certificate   Principal Balance for such Class after distributions
and the   allocation of Realized   Losses on the prior   Distribution   Date and (B)
R0*P0.

        a1 = the lesser of (A) the sum for all   Classes of   Certificates,   other
than the Class SB Certificates, of the product for each Class of (i) the monthly
interest rate (as limited by the Net WAC Cap Rate, if applicable) for such Class
applicable for distributions to be made on the next succeeding Distribution Date
and (ii) the   aggregate   Certificate   Principal   Balance   for such   Class   after
distributions   and   the   allocation   of   Realized   Losses   to be   made   on   such
Distribution Date and (B) R1*P1.

        Then, based on the foregoing definitions:

        AY1 =   AP - AY2 - AY3 - AY4;

        AY2 =   (a/2){( a0R1 - a1R0)/R0R1};

        AY3 =   aAP - AY2; and

        AY4 =   AY3.

if both AY2 and AY3, as so determined, are non-negative numbers. Otherwise:

         (1) If AY2, as so determined, is negative, then

        AY2 = 0;

        AY3 = a{a1R0P0 - a0R1P1}/{a1R0};

        AY4 = AY3; and

        AY1 = AP - AY2 - AY3 - AY4.

        (2) If AY3, as so determined, is negative, then

        AY3 = 0;

         AY2 = a{a1R0P0 - a0R1P1}/{2R1R0P1 -   a1R0};

        AY4 = AY3; and

        AY1 = AP - AY2 - AY3 - AY4.



        REMIC I Realized Losses:   Realized Losses on the Mortgage Loans shall be
allocated to the REMIC I Regular   Interests as follows:   The interest portion of
Realized   Losses on the Mortgage   Loans,   if any,   shall be allocated   among the
REMIC I Regular   Interests   LT1, LT2 and LT4 pro rata according to the amount of
interest accrued but unpaid thereon, in reduction thereof.   Any interest portion
of such   Realized   Losses in   excess of the   amount   allocated   pursuant   to the
preceding   sentence shall be treated as a principal   portion of Realized   Losses
not   attributable   to any specific   Mortgage Loan and allocated   pursuant to the
succeeding   sentences.   The principal portion of Realized Losses on the Mortgage
Loans, if any, shall be allocated   first, to the REMIC I Regular   Interests LT2,
LT3 and LT4 pro rata according to their respective   Principal   Reduction Amounts
to the extent thereof in reduction of the   Uncertificated   Principal   Balance of
such REMIC I Regular   Interests   and,   second,   the   remainder,   if any, of such
principal   portion of such   Realized   Losses   shall be   allocated to the REMIC I
Regular   Interest   LT1 in   reduction   of the   Uncertificated   Principal   Balance
thereof.

        REMIC I   Regular   Interests:   REMIC I   Regular   Interest   LT1,   REMIC II
Regular   Interest   LT2,   REMIC II   Regular   Interest   LT3 and   REMIC II   Regular
Interest LT4.

        REMIC I Regular Interest LT1: A regular interest in REMIC I that is held
as an asset of REMIC II,   that has an   initial   principal   balance   equal to the
related   Uncertificated   Principal   Balance,   that bears interest at the related
Uncertificated   REMIC I Pass-Through   Rate, and that has such other terms as are
described herein.

        REMIC I Regular   Interest LT1   Principal   Distribution   Amount:   For any
Distribution   Date,   the   excess,   if any, of the REMIC I Regular   Interest   LT1
Principal   Reduction Amount for such   Distribution Date over the Realized Losses
allocated to the REMIC I Regular Interest LT1 on such Distribution Date.

        REMIC I Regular Interest LT2: A regular interest in REMIC I that is held
as an asset of REMIC II,   that has an   initial   principal   balance   equal to the
related   Uncertificated   Principal   Balance,   that bears interest at the related
Uncertificated   REMIC I Pass-Through   Rate, and that has such other terms as are
described herein.

        REMIC I Regular   Interest LT2   Principal   Distribution   Amount:   For any
Distribution   Date,   the   excess,   if any, of the REMIC I Regular   Interest   LT2
Principal   Reduction Amount for such   Distribution Date over the Realized Losses
allocated to the REMIC I Regular Interest LT2 on such Distribution Date.

        REMIC I Regular   Interest   LT3: A regular   interest   in REMIC II that is
held as an asset of REMIC II, that has an initial principal balance equal to the
related   Uncertificated   Principal   Balance,   that bears interest at the related
Uncertificated   REMIC I Pass-Through   Rate, and that has such other terms as are
described herein.

        REMIC I Regular   Interest LT3   Principal   Distribution   Amount:   For any
Distribution   Date,   the   excess,   if any, of the REMIC I Regular   Interest   LT3
Principal   Reduction Amount for such   Distribution Date over the Realized Losses
allocated to the REMIC I Regular Interest LT3 on such Distribution Date.

        REMIC I Regular   Interest   LT4: A regular   interest   in REMIC II that is
held as an asset of REMIC II, that has an initial principal balance equal to the
related   Uncertificated   Principal   Balance,   that bears interest at the related
Uncertificated   REMIC I Pass-Through   Rate, and that has such other terms as are
described herein.

         REMIC I Regular   Interest LT4   Principal   Distribution   Amount:   For any
Distribution   Date,   the   excess,   if any, of the REMIC I Regular   Interest   LT4
Principal   Reduction Amount for such   Distribution Date over the Realized Losses
allocated to the REMIC I Regular Interest LT4 on such Distribution Date.

        REMIC II: The segregated pool of assets subject   hereto,   constituting a
portion of the primary trust created   hereby and to be   administered   hereunder,
with respect to which a separate REMIC election is to be made, consisting of the
REMIC I Regular Interests.

        REMIC II Regular Interest SB-PO: A separate non-certificated   beneficial
ownership   interest in REMIC II issued   hereunder   and   designated as a REMIC II
Regular   Interest.   REMIC II Regular Interest SB-PO shall have no entitlement to
interest,   and shall be entitled to   distributions   of principal   subject to the
terms   and   conditions    hereof,   in   aggregate   amount   equal   to   the   initial
Certificate   Principal   Balance of the Class SB Certificates as set forth in the
Preliminary Statement hereto.

        REMIC II Regular Interest SB-IO: A separate non-certificated   beneficial
ownership   interest in REMIC II issued   hereunder   and   designated as a REMIC II
Regular   Interest.   REMIC II Regular Interest SB-IO shall have no entitlement to
principal,   and shall be entitled to   distributions   of interest   subject to the
terms   and   conditions   hereof,   in   aggregate   amount   equal   to   the   interest
distributable   with respect to the Class SB   Certificates   pursuant to the terms
and conditions hereof.

        REMIC II Regular Interests:   REMIC II Regular Interests SB-IO and SB-PO,
together   with the   regular   interests   in REMIC II   represented   by the Class A
Certificates   and   Class   M   Certificates    exclusive   of   the   rights   of   such
Certificates to payments of Basis Risk Shortfall Amounts and to payments derived
from the Yield Maintenance Agreement.

        REMIC   Administrator:   Residential Funding   Corporation.   If Residential
Funding   Corporation is found by a court of competent   jurisdiction to no longer
be able to fulfill its obligations as REMIC   Administrator   under this Agreement
the Master Servicer or Trustee acting as successor Master Servicer shall appoint
a   successor    REMIC    Administrator,    subject   to    assumption   of   the   REMIC
Administrator obligations under this Agreement.

        REMIC   Provisions:   Provisions of the federal income tax law relating to
real estate mortgage investment conduits,   which appear at Sections 860A through
860G of   Subchapter   M of Chapter 1 of the Code,   and   related   provisions,   and
temporary and final   regulations (or, to the extent not   inconsistent   with such
temporary or final   regulations,   proposed   regulations) and published   rulings,
notices and   announcements   promulgated   thereunder,   as the foregoing may be in
effect from time to time.

        REO Acquisition: The acquisition by the Master Servicer on behalf of the
Trustee for the benefit of the   Certificateholders   of any REO Property pursuant
to Section 3.14.

        REO   Disposition:   With respect to any REO Property,   a determination by
the Master Servicer that it has received   substantially all Insurance   Proceeds,
Liquidation Proceeds,   REO Proceeds and other payments and recoveries (including
proceeds   of a final   sale)   which the   Master   Servicer   expects   to be finally
recoverable from the sale or other disposition of the REO Property.

        REO Imputed Interest:   With respect to any REO Property, for any period,
an amount   equivalent to interest (at a rate equal to the Net Mortgage Rate that
would have been applicable to the related Mortgage Loan had it been outstanding)
on the   unpaid   principal   balance   of the   Mortgage   Loan   as of   the   date   of
acquisition thereof for such period.

        REO Proceeds:   Proceeds, net of expenses, received in respect of any REO
Property (including, without limitation, proceeds from the rental of the related
Mortgaged   Property)   which   proceeds   are   required   to be   deposited   into the
Custodial Account only upon the related REO Disposition.

        REO Property:   A Mortgaged   Property   acquired by the Master Servicer on
behalf of the   Trust   Fund for the   benefit   of the   Certificateholders   through
foreclosure   or deed   in lieu of   foreclosure   in   connection   with a   defaulted
Mortgage Loan.

        Reportable   Modified   Mortgage Loan: Any Mortgage Loan that (a) has been
subject to an interest rate reduction,   (b) has been subject to a term extension
or (c) has had amounts owing on such Mortgage   Loan   capitalized   by adding such
amount to the Stated Principal Balance of such Mortgage Loan; provided, however,
that a Mortgage   Loan   modified   in   accordance   with (a) above for a   temporary
period shall not be a Reportable   Modified   Mortgage   Loan if such Mortgage Loan
has not been   delinquent   in payments of   principal   and interest for six months
since the date of such   modification if that interest rate reduction is not made
permanent thereafter.

        Repurchase Event:   As defined in the Assignment Agreement.

        Request   for   Release:   A   request   for   release,   the   form of which is
attached as Exhibit G hereto,   or an electronic   request in a form acceptable to
the Custodian.

        Required   Insurance   Policy:   With   respect to any   Mortgage   Loan,   any
insurance policy which is required to be maintained from time to time under this
Agreement, the Program Guide or the related Subservicing Agreement in respect of
such Mortgage Loan.

        Required   Overcollateralization Amount: With respect to any Distribution
Date,   (a) prior to the Stepdown Date, an amount equal to 2.85% of the aggregate
Stated Principal Balance of the Mortgage Loans as of the Cut-off Date, (b) on or
after the Stepdown Date if a Trigger Event is not in effect,   the greater of (i)
an amount equal to 5.70% of the aggregate   outstanding   Stated Principal Balance
of the   Mortgage   Loans   after   giving   effect   to   distributions   made   on that
Distribution Date and (ii) the   Overcollateralization   Floor and (c) on or after
the   Stepdown   Date if a Trigger   Event is in   effect,   an   amount   equal to the
Required    Overcollateralization    Amount    from    the    immediately    preceding
Distribution Date. The Required   Overcollateralization   Amount may be reduced so
long as written   confirmation   is   obtained   from each   Rating   Agency that such
reduction shall not reduce the ratings   assigned to any Class of Certificates by
such   Rating   Agency   below the lower of the   then-current   rating or the rating
assigned to such Certificates as of the Closing Date by such Rating Agency.

        Residential   Funding:    Residential   Funding   Corporation,    a   Delaware
corporation,   in its capacity as seller of the Mortgage   Loans to the   Depositor
and any successor thereto.

        Responsible Officer:   When used with respect to the Trustee, any officer
of the   Corporate   Trust   Department   of the Trustee,   including any Senior Vice
President,   any Vice   President,   any Assistant   Vice   President,   any Assistant
Secretary, any Trust Officer or Assistant Trust Officer, or any other officer of
the Trustee, in each case, with direct   responsibility for the administration of
this Agreement.

        RFC Exemption:   As defined in Section 5.02(e)(ii).

         Rule 144A: Rule 144A under the Securities Act of 1933, as in effect from
time to time.

        Seller:   With respect to any   Mortgage   Loan,   a Person,   including   any
Subservicer,   that   executed a Seller's   Agreement   applicable   to such Mortgage
Loan.

        Seller's   Agreement:   An   agreement   for   the   origination   and   sale of
Mortgage   Loans   generally   in the form of the seller   contract   referred   to or
contained in the Program   Guide,   or in such other form as has been   approved by
the Master Servicer and the Depositor.

        Senior Enhancement Percentage:   For any Distribution Date, the fraction,
expressed   as a   percentage,   the   numerator   of   which   is the   sum of (i)   the
aggregate Certificate Principal Balance of the Class M Certificates and (ii) the
Overcollateralization   Amount,   in each case   prior to the   distribution   of the
Principal   Distribution   Amount on such Distribution Date and the denominator of
which is the   aggregate   Stated   Principal   Balance of the Mortgage   Loans after
giving effect to distributions to be made on that Distribution Date.

        Servicing   Accounts:   The   account or accounts   created   and   maintained
pursuant to Section 3.08.

        Servicing   Advances:   All   customary,   reasonable   and necessary "out of
pocket" costs and expenses incurred in connection with a default, delinquency or
other   unanticipated   event   by the   Master   Servicer   or a   Subservicer   in the
performance   of its servicing   obligations,   including,   but not limited to, the
cost of (i) the preservation, restoration and protection of a Mortgaged Property
or, with respect to a cooperative loan, the related cooperative apartment,   (ii)
any enforcement or judicial proceedings,   including foreclosures,   including any
expenses   incurred   in   relation   to any such   proceedings   that result from the
Mortgage Loan being   registered on the MERS(R) System,   (iii) the management and
liquidation of any REO Property,   (iv) any mitigation procedures   implemented in
accordance   with Section 3.07, and (v)   compliance   with the   obligations   under
Sections 3.01, 3.08, 3.11, 3.12(a) and 3.14,   including,   if the Master Servicer
or any Affiliate of the Master Servicer provides services such as appraisals and
brokerage services that are customarily provided by Persons other than servicers
of mortgage loans, reasonable compensation for such services.

        Servicing Fee: With respect to any Mortgage Loan and Distribution   Date,
the fee payable   monthly to the Master   Servicer in respect of master   servicing
compensation   that   accrues at an annual   rate equal to the   Servicing   Fee Rate
multiplied   by the   Stated   Principal   Balance of such   Mortgage   Loan as of the
related   Due Date in the related   Due   Period,   as may be   adjusted   pursuant to
Section 3.16(e).

        Servicing   Fee Rate:   With respect to any Mortgage   Loan,   the per annum
rate   designated on the Mortgage Loan Schedule as the "MSTR SERV FEE," as may be
adjusted with respect to successor Master Servicers as provided in Section 7.02,
which rate shall never be greater than the Mortgage Rate of such Mortgage Loan.

        Servicing   Modification:   Any   reduction of the interest   rate on or the
outstanding   principal   balance of a Mortgage   Loan,   any extension of the final
maturity   date of a Mortgage   Loan,   and any   increase   to the Stated   Principal
Balance of a   Mortgage   Loan by adding to the Stated   Principal   Balance   unpaid
principal and interest and other amounts owing under the Mortgage   Loan, in each
case pursuant to a   modification   of a Mortgage Loan that is in default,   or for
which, in the judgment of the Master Servicer, default is reasonably foreseeable
in accordance with Section 3.07(a).

        Servicing   Officer:   Any officer of the Master Servicer   involved in, or
responsible   for, the   administration   and servicing of the Mortgage Loans whose
name and specimen   signature appear on a list of servicing officers furnished to
the Trustee by the Master   Servicer on the Closing   Date,   as such list may from
time to time be amended.

        Sixty-Plus Delinquency Percentage: With respect to any Distribution Date
and   the   Mortgage   Loans,   the   arithmetic   average,   for   each   of   the   three
Distribution   Dates   ending   with   such   Distribution   Date,   of   the   fraction,
expressed as a percentage,   equal to (x) the aggregate Stated Principal   Balance
of the   Mortgage   Loans   that   are 60 or more   days   delinquent   in   payment   of
principal and interest for that Distribution   Date,   including Mortgage Loans in
foreclosure and REO, over (y) the aggregate Stated   Principal   Balance of all of
the Mortgage Loans immediately preceding that Distribution Date.

        Standard & Poor's: Standard & Poor's Ratings Services, a division of The
McGraw-Hill Companies, Inc. or its successors in interest.

        Startup Date:   The day designated as such pursuant to Article X hereof.

        Stated Principal   Balance:   With respect to any Mortgage Loan or related
REO Property,   as of any date of   determination,   (i) the sum of (a) the Cut-off
Date   Principal   Balance   of the   Mortgage   Loan and (b) any amount by which the
Stated Principal   Balance of the Mortgage Loan has been increased   pursuant to a
Servicing   Modification,   minus (ii) the sum of (a) the principal portion of the
Monthly   Payments due with respect to such Mortgage Loan or REO Property   during
each   Due   Period   ending   with   the Due   Period   relating   to the   most   recent
Distribution   Date which were   received or with   respect to which an Advance was
made,   (b) all Principal   Prepayments   with respect to such Mortgage Loan or REO
Property, and all Insurance Proceeds,   Liquidation Proceeds and REO Proceeds, to
the   extent   applied   by the Master   Servicer   as   recoveries   of   principal   in
accordance with Section 3.14 with respect to such Mortgage Loan or REO Property,
in each case which were   distributed   pursuant to Section   4.02 on any   previous
Distribution   Date,   and (c) any   Realized   Loss   incurred   with respect to such
Mortgage   Loan   allocated to   Certificateholders   with   respect   thereto for any
previous Distribution Date.

        Stepdown Date: That   Distribution   Date which is the earlier to occur of
(a) the Distribution Date immediately   succeeding the Distribution Date on which
the aggregate Certificate Principal Balance of the Class A Certificates has been
reduced   to zero and (b) the   later to   occur   of (i) the   Distribution   Date in
January   2009   and   (ii)   the   first   Distribution   Date   on   which   the   Senior
Enhancement Percentage is equal to or greater than 41.50%.

        Subordination:   The provisions described in Section 4.05 relating to the
allocation of Realized Losses.

        Subordination   Percentage:   With   respect   to   each   Class   of   Class   A
Certificates   and Class M   Certificates,   the   respective   percentage   set forth
below.

                                 Subordination
                                Class Percentage
                                    A 58.50%
                                   M-1 66.00%
                                    M-2 72.50%
                                   M-3 76.40%
                                   M-4 79.90%
                                   M-5 83.20%
                                   M-6 86.40%
                                   M-7 89.40%
                                    M-8 92.10%
                                   M-9 94.30%

        Subsequent Recoveries:   As of any Distribution Date, amounts received by
the Master   Servicer   (net of any related   expenses   permitted to be   reimbursed
pursuant   to Section   3.10) or surplus   amounts   held by the Master   Servicer to
cover estimated expenses   (including,   but not limited to, recoveries in respect
of the representations and warranties made by the related Seller pursuant to the
applicable   Seller's   Agreement and assigned to the Trustee   pursuant to Section
2.04)   specifically   related to a Mortgage   Loan that was the   subject of a Cash
Liquidation or an REO   Disposition   prior to the related   Prepayment   Period and
that resulted in a Realized Loss.

         Subserviced   Mortgage   Loan:   Any   Mortgage   Loan   that,   at the time of
reference thereto, is subject to a Subservicing Agreement.

        Subservicer: Any Person with whom the Master Servicer has entered into a
Subservicing Agreement and who generally satisfied the requirements set forth in
the Program Guide in respect of the   qualification   of a   Subservicer   as of the
date of its approval as a Subservicer by the Master Servicer.

        Subservicer   Advance:   Any   delinquent    installment   of   principal   and
interest on a Mortgage Loan which is advanced by the related Subservicer (net of
its Subservicing Fee) pursuant to the Subservicing Agreement.

        Subservicing   Account:   An   account   established   by   a   Subservicer   in
accordance with Section 3.08.

        Subservicing Agreement: The written contract between the Master Servicer
and any Subservicer relating to servicing and administration of certain Mortgage
Loans as   provided   in   Section   3.02,   generally   in the   form of the   servicer
contract   referred to or contained in the Program Guide or in such other form as
has been approved by the Master Servicer and the Depositor.

        Subservicing   Fee:   With respect to any Mortgage   Loan,   the fee payable
monthly to the related Subservicer (or, in the case of a Nonsubserviced Mortgage
Loan, to the Master Servicer) in respect of subservicing and other   compensation
that accrues with respect to each Distribution Date at an annual rate designated
as "SUBSERV FEE" on the Mortgage Loan Schedule.

        Tax Returns:   The federal income tax return on Internal   Revenue Service
Form 1066,   U.S.   Real Estate   Mortgage   Investment   Conduit   Income Tax Return,
including   Schedule Q thereto,   Quarterly Notice to Residual Interest Holders of
REMIC Taxable Income or Net Loss Allocation, or any successor forms, to be filed
on behalf of any REMIC hereunder due to its   classification as a REMIC under the
REMIC   Provisions,   together   with any and all   other   information,   reports   or
returns that may be required to be furnished to the   Certificateholders or filed
with the Internal   Revenue Service or any other   governmental   taxing   authority
under any applicable provisions of federal, state or local tax laws.

        Telerate Screen Page 3750:   As defined in Section 1.02.

        Transfer: Any direct or indirect transfer,   sale, pledge,   hypothecation
or other form of assignment of any Ownership Interest in a Certificate.

        Transfer Affidavit and Agreement: As defined in Section 5.02(f).

        Transferee:   Any Person   who is   acquiring   by   Transfer   any   Ownership
Interest in a Certificate.

        Transferor:   Any Person who is   disposing   by Transfer of any   Ownership
Interest in a Certificate.

        Trigger   Event:   A   Trigger   Event   is in   effect   with   respect   to any
Distribution   Date on or after the   Stepdown   Date if either (a) the   Sixty-Plus
Delinquency   Percentage,   as determined   on that   Distribution   Date,   equals or
exceeds 40.00% of the Senior   Enhancement   Percentage for that Distribution Date
or (b) on or after the   Distribution   Date in January 2008, the aggregate amount
of Realized   Losses on the Mortgage   Loans as a   percentage   of the Cut-off Date
Balance exceeds the applicable amount set forth below:

January 2008 to   December   2008:   1.60% with   respect to January   2008,   plus an
        additional 1/12th of 2.00% for each month thereafter.

January 2009 to   December   2009:   3.60% with   respect to January   2009,   plus an
        additional 1/12th of 2.05% for each month thereafter.

January 2010 to   December   2010:   5.65% with   respect to January   2010,   plus an
        additional 1/12th of 0.60% for each month thereafter.

January 2011 to   December   2011:   6.25% with   respect to January   2011,   plus an
        additional 1/12th of 0.75% for each month thereafter.

January 2012 and thereafter: 7.00%.

        Trustee:   As defined in the preamble hereto.

        Trust Fund: The segregated pool of assets subject hereto, consisting of:
(i) the Mortgage Loans and the related Mortgage Files;   (ii) all payments on and
collections   in respect of the Mortgage   Loans due after the Cut-off Date (other
than   Monthly   Payments   due in the   month of the   Cut-off   Date) as shall be on
deposit in the Custodial Account or in the Certificate Account and identified as
belonging to the Trust Fund;   (iii)   property   which secured a Mortgage Loan and
which has been acquired for the benefit of the Certificateholders by foreclosure
or deed in lieu of foreclosure;   (iv) the hazard insurance   policies and Primary
Insurance   Policies   pertaining   to the   Mortgage   Loans,   if any; (v) the Yield
Maintenance Agreement; and (vi) all proceeds of clauses (i) through (v) above.

        Uncertificated   Accrued   Interest:   With   respect to any REMIC I Regular
Interest   for   any   Distribution   Date,   one   month's   interest   at the   related
Uncertificated   REMIC I Pass-Through Rate for such Distribution Date, accrued on
its   Uncertificated   Principal   Balance   immediately   prior to such Distribution
Date.   Uncertificated   Accrued Interest for the REMIC I Regular   Interests shall
accrue on the basis of a 360-day year   consisting of twelve 30-day   months.   For
purposes of calculating the amount of   Uncertificated   Accrued   Interest for the
REMIC I Regular   Interests for any   Distribution   Date, any Prepayment   Interest
Shortfalls and Relief Act Shortfalls (to the extent not covered by   Compensating
Interest)   relating to the   Mortgage   Loans for any   Distribution   Date shall be
allocated among REMIC I Regular   Interests LT1, LT2, LT3 and LT4 pro rata, based
on, and to the extent of, Uncertificated Accrued Interest, as calculated without
application   of this   sentence.   Uncertificated   Accrued   Interest   on   REMIC II
Regular Interest SB-PO shall be zero.   Uncertificated   Accrued Interest on REMIC
II   Regular   Interest   SB-IO for each   Distribution   Date   shall   equal   Accrued
Certificate Interest for the Class SB Certificates.

        Uncertificated   Principal   Balance:   The principal amount of any REMIC I
Regular Interest outstanding as of any date of determination. The Uncertificated
Principal   Balance of each   REMIC I Regular   Interest   shall   never be less than
zero. With respect to the REMIC II Regular Interest SB-PO the initial amount set
forth   with   respect   thereto   in   the   Preliminary    Statement   as   reduced   by
distributions   deemed   made in respect   thereof   pursuant   to   Section   4.02 and
Realized Losses allocated thereto pursuant to Section 4.05.

        Uncertificated    REMIC   I   Pass-Through    Rate:    With   respect   to   any
Distribution   Date and (i) REMIC I Regular   Interests   LT1 and LT2, the weighted
average of the Net Mortgage   Rates of the Mortgage   Loans,   (ii) REMIC I Regular
Interest LT3, zero (0.00%),   and (iii) REMIC I Regular   Interest LT4,   twice the
weighted average of the Net Mortgage Rates of the Mortgage Loans.

        Uniform Single   Attestation   Program for Mortgage   Bankers:   The Uniform
Single   Attestation   Program for Mortgage Bankers,   as published by the Mortgage
Bankers   Association   of America and   effective   with respect to fiscal   periods
ending on or after December 15, 1995.

        Uninsured   Cause:   Any cause of damage to property subject to a Mortgage
such that the complete restoration of such property is not fully reimbursable by
the hazard insurance policies.

        United   States   Person:   A citizen or resident of the United   States,   a
corporation,    partnership   or   other   entity    (treated   as   a   corporation   or
partnership for United States federal income tax purposes)   created or organized
in, or under the laws of, the United States, any state thereof,   or the District
of   Columbia   (except in the case of a   partnership,   to the extent   provided in
Treasury   regulations) provided that, for purposes solely of the restrictions on
the transfer of Class R Certificates,   no partnership or other entity treated as
a partnership   for United States federal income tax purposes shall be treated as
a   United   States   Person   unless   all   persons   that   own an   interest   in such
partnership   either directly or through any entity that is not a corporation for
United   States   federal   income tax   purposes   are   required   by the   applicable
operative   agreement to be United States Persons, or an estate that is described
in Section   7701(a)(30)(D)   of the Code, or a trust that is described in Section
7701(a)(30)(E) of the Code.