Are you sure your problems are not releated to runing on your western systems? All the vids i see on you tube of russians running the game dont seem to behave as badly as your saying yours does.
Can any of the russian guys confirm there systems are saying the game is poorly optimised?
Also remember Arma2 in the begining, it was a nightmare now its way better.

@ David - in the config file, find the line in section [BOB]
AntiEpilepcy =
and change to AntiEpilepcy = 0,

If this line is not - then insert.
save config

This is what I heard on SIMHQ. Dont blame me if you start frothing at the mouth !