Is each key unique to ech CD? I'm sucessfully playing backups of Silent Hunter 3 and Chaos Theory thanks to Karllmuller, and if I can do it, then anyone can. I must stress I've bought both games, and made my own MDS images. I've tried the USB drive trick on 3 different PC's, all with different hardware, and both games run perfectly on all of them (As far as I can tell). I must say that none of the PC's had any internal drives at this point, so I'm not sure if using STARF***ER to disable the IDE channels would work. I shall be trying this shortly and will report back with my findings. Using the Silent Hunter 3 NODVD fix bypasses the disc check completely, and also appears to have different gameplay from the untampered version, though with the open nature of the game it's tricky to tell. If (Big IF) a Chaos Theory fix becomes available, it will be a lot easier to tell if the gameplay is the same. I suspect this is why there isn't one available yet.
Using the USB drive trick allows you to keep the original safe, yet still update the game to the latest version, which in some respects is better than a nocd/dvd crack, though I'm pretty sure that the next Starforce update will fix this loophole, and that will be the end of RELIABLE game backups. I'm not throwing accusations, but maybe some people having problems with this method don't have the original DVD's, if you know what I mean