I was waiting on Mr. Bergeron or someone else to sort this out. I recommend using his book on Louisiana units. If you know your ancestor's name you can check Booths records for what unit he served with. You can then check to see if he filed a pension application. I am listing the links below. Hope this helps.

Bergeron book:
http://www.lsu.edu/lsupress/catalog/fal-win-96/bergeron.htm

Booth's records online:
http://ftp.rootsweb.com/pub/usgenweb/la/military/civilwar/booth/

Search Louisiana Confederate Pension Applications:
http://www.sec.state.la.us/archives/gen/cpa-alpha.htm