I have alot of Mosstellers that fought. They were in the 18th, 22nd, 36th and 40th Ga Inf as well as the 3rd and 7th Ga Cav. Also Allen's in the 1st Ga Res. I have two websites That be of interest to you. They are:
http://www.researchonline.net/gacw/mastindex.htm
http://www.rootsweb.com/~usgenweb/ga/military/civilwar/regiment.htm

Paul