http://www.autogk.me.uk/ Auto Gordian Knot, best DVD to DIVx/XVid software you can get and it's free...
You also need something like AnyDVD
http://www.slysoft.com/en/anydvd.html to let you copy/convert the DVD 'cos most are protected by CSS (copyright crap). It's not like you own the DVD or anything....