I just wanted to verify but I assume if I purchase CALs that they will work on the MSDN supplied version of Win2003/Win2008 Server. Thanks.

Hello, For license questions, please call 1-800-426-9400 (select option 4), Monday through Friday, 6:00 A.M. to 5:30 P.M. (PST) to speak directly to a Microsoft licensing specialist. Worldwide customers can use the Guide to Worldwide Microsoft Licensing Sites http://www.microsoft.com/licensing/index/worldwide.asp to find contact information in their locations. Thanks.

The ms link you are providing does not work.