If you`re going to "backup" then you need to "buy" DVD2ONE and download DVD Decrypter. Then it`s just a matter of ripping the original files to your HD (DVDDecrypter will do this automatically( and then run DVD2One and select the soundtrack and subs etc...
Then burn away usinf RecordNow Max or Nero. You may need to watch what media you use, when I started "backing up" I wasted lots of Bulqpak disks that just stuck and skipped at the end of a longish movie.
If you`re not too happy with the output quality of DVD2One then you may want to look at Pinnacle Instant Copy.
Hope that helps.