Right so no-one on the whole forum knows? Wow. You're all so helpful to lurkers like me. If it can't be done at least say, so I'm not sat here waiting.
There are several shareware DVD rippers out there. I'm demoing a couple right now. I found AOA DVD Ripper did a better job transferring to AVI and mpeg, and ripping audio to .wav separately.
Worked fabulously - smooth video using Directshow window. It takes a while though - slower than realtime for mpeg2 - a 5 minute video took about 15 minutes to extract. I cut a 1 minute clip to 320X240 AVI in about 1 minute (another minute or so for the .wav file). It does have an option to shutdown your PC when done for those long, overnight jobs.
It will extract full movies, chapters or clips (you set start/end/length times), and allow you to choose audio quality, AVI encoder, etc.