I've never really encountered this problem, maybe some games I couldn't backup/play back but from my understanding from here:
The game can check if it is a backup copy because when it's put in a writer, the writer can read the ATIP? What I want to know is what happens if you don't have a CD-ROM? I have a DVD Rewriter and a Liteon 241012b CD rewriter. Will this need some kind of clone CD tray application? (I don't have cloneCD, can I just run Alcohol and it takes care of it or do I need to set it up somehow?)
I am also confused because what is the difference between a CD that you burn at home, and the original CDs a game comes on? Aren't they both the same kind of thing i.e. burned CDs? The originals have ATIP too? But those work fine on either of my drives without any kind of "hide media" thing...