Hi mate, most people now use 1946 (a collection of all il2 games on one disc) and patch that to 4.08, this will give you the most up to date AI. If you want to stick with FB 1.22 i'm not sure i can provide much accurate info as that was a long time ago!
As for gunnery, remember, short accurate bursts!
Check here for starting up in 1946:
http://forums.ubi.com/eve/ubb.x?a=fr...102&f=23110283