CloneCD is suck on unprotected CD's. It tries to copy all error correction codes over-riding driver's internal error correciton scheme. It is done so, because many games includes security keys in error correction sectors. On unprotected discs, this just means more chance of error getting into your copy and since you're copying more than the user area, the resulting file is larger. I'd say use copy disc in Nero. Works really well. If you want to keep the image file, simply check "DO NOT DELETE Image after successful burn".