Steve,

This is apparently at LSU:

MICROFICHE 9184 LA:2.
Official army register of the volunteer force of the United States Army for the years 1861, '62, '63, '64, '65 [microform] : [Louisiana]
United States. Adjutant-General's Office.

Special Collections, Hill Memorial Library Items Material Location
MICROFICHE 9184 LA:2. 1 Microform Louisiana & Lower Mississippi Valley Collections

Jim