Whats happenin fellow geniuses

ok maybe im a bit off the mark giving myself that title which is why im here asking for help
I recently flashed my friends Benq drive and although every other game work for some reason the new COD MW2 does not, it works absolutely fine on my flashed Hitachi 0079 ( which was a b*tch to flash compared to his simple Benq )
iv tried 2 diffirent downloads of the same game but to no avail, anyone have any idea's ? iv read a couple of other topics on unrelated matters saying that you need to somehow alter the file on abgx for game downloads that are not retail versions ( iv had cod since last monday so im guessing its not retail ?? ) but im only just competent in flashing i wouldn't know where to start in abgx
I can post abgx report if it helps, this guys been salivating over the new COD for months now its not right that he cant play his beloved MW2
Cheers