1. will you improve it in anyway for arma2?
how about distant gunfire will it be done in another way?
as it is now it just muffles the sound but it should be more like 3 different sounds: 1 close, 1 medium distance and 1 far that fade in to eachother depending on the distance.
its not very resource consuming and most cards are able to mix sounds without problems. like if you were 20 meters away it would play the close gunshot but if you were say 50-100 meters away it would gradually fade in the medium-distance sound with the close gunshot until you reached the "medium distance" range where only the medium-distance sound would be played.
2. what kind of resources are you putting into getting realistic sounds? are you gonna record your own samples from real weapons? im sure the army wouldnt have a problem if you asked them if you were allowed to record a few sounds at their gunrange.