i dont know if people have tryed this (or if it even matters ) but i used my nvidia control panel added arma 2 to the games list and changed settings for the game thru the manage 3D section and changed the settings to override the application i also noticed arma 2 was using 2 monitors so changed that to one monitor and got better results. I found that the dogs of war level improved a bit and was bit smother. my specs are core2duo E6320 2GHz 2 gig ram BFG 8800 GT OC 512Mb (i think) so i wasent expecting much but it seems to work
try it?