So I tried DVD Shrink through Vista, didn't work out. Errors, disappearing DVD drives, etc. Not happy. I wasn't very happy. So I went to my Mac looking for a similar program, which doesn't exist.
Then I thought, "What the heck, might as well." And I installed DVD Shrink through Darwine.
Worked flawlessly. I dunno if anyone else has reported this, so I just thought I'd post it. DVD Shrink works perfect through Darwine on mac and (I assume) linux, with no loss of speed.
I run DVD Shrink in Vista Ultimate in compatability mode with no problems what so ever. Glad you got it sorted via Darwine though, but a solution exists in Vista with little to no effort.