Hi! I believe this has been answered before but most of the post where regarding people that bought the game from steam.
I first bought arma 2 OA in a store and then a couple of months later, bought arma II from direct2drive. I then managed to merge them together somehow and got the OA.exe and everything. The thing is that i bought a new computer about a week ago and i cant remember how i did to merge them before.
Can someone please give me a simple step to step guide on how to successfully do this? It's really bugging me out..