You could try DVDFab Decrypter (free) to rip the disk to the hard drive for you, so all copy protection is removed:

http://fileforum.betanews.com/detail...r/1132478833/1

Then use DVD Shrink to help make a backup of the disk:

http://fileforum.betanews.com/detail...k/1050004458/1

you could do a full backup or a re-author. Here's one tutorial to help get you started:

http://www.mrbass.org/dvdshrink/

Good luck.