As I mentioned before, I'll suggest the method I prefer.
- DVDFab HD Deccryptor to get disc to HDD
- Gordian Knot to convert to high quality AVI (Vegas handles AVIs better)
- you can use PGCDemux to get your ac3 from the DVD folder on your HDD
- besweet to convert 5.1 ac3 to 6 wav files
Frameserving sends the video frame by frame to your editor or encoder. Check out doom9 or videohelp.com for more information.