Hello all,
unfortunatelly I'm facing teh same issue.
I bought ArmA 2 Combined Operations and British Armed Forces on Gamersgate, I downloaded the things and then installed them all by starting with ArmA2, patching it to 1.7, installing Operation Arrowhead and patching it to 1.5.4 and eventually installed BAF.
Due to a corrupted patch, I had to rince and repeat so teh whole operation took some hours.
After all that time, I was eager to play but Murphy choose that time to strike and I faced the message that tell me that the disc is not to be found and ask me to insert the original CD/DVD "ArmA2_OA_retail".
As even He (Google) didn't knew and that I haven't been able to find a decent solution (I could apply a beta patch but I want to play online and so, as far as I know, must use a non beta build).
Ironically, Pirates are not facing such issues so I'm wondering if I really have to use a NoCD crack to enjoy a game that I bought?
PS: all patch came from Gamersgate so supposed to be compatible with digital products.
Best regards