Well in backing up a DVD, I tried DVD “Decrypter”:http://www.mrbass.org/dvdrip/ but it failed with some structure errors and it is old having been updated March 2005, the other two rippers to try are “DVD43”:http://www.dvd43.com/ which runs in the background and “Smart Ripper”:http://www.afterdawn.com/software/video_software/dvd_rippers/smartripper.cfm which is now hard to find.