Backing up Need for Speed: Underground

[LeonC]

I'm having a few problems backing up my copy of Need for Speed: Underground, I've just realized it has a hair line scartch from rim to center. I want to back it up, before I find anymore scartchs in it. Well here is my problem, ... I'm using DVD Decrypter to make an ISO, and I keep getting errors, is it because of the scratch or is it something else?!