SaveDisk? Think you mean SafeDisc.
Anyway, copying SD2 is somewhat dependant on your burner and how it handles the weak sectors used as part of the protection. With some drives you will need to enable the bypass EFM option (enabled by default) where as others that fully support weaks sectors you should have it disabled. Then with some burners it ain't going to make any difference, you are simply never going to have a 1:1 copy.