Um, I'm not entirely sure lol. Combined Operations has 2 discs. First one says Arma 2 the other OA. I leave OA in my dvd drive and play from that one. I believe I'm playing Arma 2's campaign off it, Harvest Red? My desktop shortcut says Combined Operations too, so its gotta be the one.
I got high speed cable. I don't know the data rate though.