There seems to be something wrong with your install, and although I have the hardcopy version, it should be very similar.
When I install OA over Arma II, it gets integrated into the original and works as a single package which is run from the 'ArmA 2 Combined Operations' icon, that you should now have on your desktop.
It calls the 'arma2OA.exe'.
Get an app in havoc-company.com people!
Multiplayer with proper mission, non of this domination![]()
Not being a part of havoc myself, but another group, I can't rate highly enough how important it is to join a group in the name of FUN!.
This game turns shades of day to night when you play with a proper group, using the correct mods that make the game better A.C.E, anyone who doesn't use ACE isn't worth playing with, proper made missoins with enhanced scripting, a working comms system/structure and much much more.
You're not helping yourself if you play johhny solo on some domination server.
Ive got the game to of course I love ARMA hehehe.
I haven't played it much but it seems to run better than ARMA2 did on release.
Have you lot tried the latest beta yet that's meant to make it on par with ARMA2 1.07 which I might add runs very well for me.
I haven't played OA much and not with th beta patch to so cant comment hope to get into it today tho.
try the beta patch