Jim,
I just talked to Elaine Smyth, Curator of Special Collections at Hill Memorial Library at LSU. She told me that the Civil War Center is currently experiencing staffing problems, and that their web site is down temporarily, for an indefinite period. No guess as to when it will be operational again. For more information, you can contact her at esmyth@lsu.edu, or by phone at (225) 578-6547.