A while ago I bought ArmA 2: Combined Operations. I just recently bought a new computer and I cannot find all the discs for the game so I can't install it. I managed to find one of them, Because its the one I was using to play the game. Is it possible for me to download the game with a Torrent and use the disc I have to play it, Or will it still activate FADE and ruin the game-play.

Thank you in advance