I hope that was not meant to be a serious comment...
I can't believe no one has done this yet, I think I could get it done if I had the DVD, I know a few things about DVD's and audio.
My only concern is if we should even post it here.
EDIT: After doing a bit of research, I think the reason it wasn't done until 2005 was that the used encryption method was uncracked until that point. The encryption seems to be the main complication here, as usual.
But as Astat said, years ago it was way more complicated than it is now.