ps2 backups

Nero is fine for copying proven backups. The issue here might be on the word PROVEN. Dead dodgy downloaded backups (without condemning them all). If you've got an original PS2 game, esp. Silent Scope because it needs no patches and will thus copy with Nero, try that and see what happens.

I assume you've got an original CD game or two and that you are in a PAL region. Look the game up on http://www.megagames.com. If there is no patch listed for the PAL version, then it most likely can be copied by Nero. If patches are needed, download CDR-WIN; get the tuortial from the megagames site and patch the game to make it work. That should work. Then the downloads are rubbish or need patching because they are NTSC or something.

Let us all know how you get on.