RE: Exercise of Put Option

EXHIBIT 10.90.5

Catamount Resources Corporation
77 Grove Street
Rutland, Vermont 05701

November 21, 2005

Diamond Castle Holdings, LLC
280 Park Avenue
New York, NY 10017
Attention: Ari J. Benacerraf and Daniel H. Clare
Facsimile: (212) 983-1234

RE: Exercise of Put Option

Ladies and Gentlemen:

              We refer to that certain Put Option Purchase and Sale Agreement, dated as of October 12, 2005 (the " Agreement ") entered into between us and CEC Wind Acquisition, LLC. Pursuant to Section 4.06 of the Agreement and an Assignment and Assumption Agreement, dated as of October 31, 2005, CEC Wind Acquisition, LLC assigned all of its rights, benefits, obligations, liabilities and responsibilities under the Agreement to Diamond Castle Partners IV, L.P., Diamond Castle Partners IV-A, L.P., Deal Leaders Fund, L.P. (collectively, " DCP ").

              Terms defined in the Agreement (except where otherwise defined herein) shall have the same respective meanings herein.

              This letter agreement sh