DVD audio to Hard Drive for Slim Device?


We have several concert dvd's that we would like to rip the music to hd and have access to on the squeezebox. Is it possible and what will I need to be able to accomplish it?
Thanks
Steve
scoly1
Have you tried these?

http://www.castudio.org/dvdaudioextractor/
http://www.xilisoft.com/dvd-audio-ripper.html
Sidssp
Just what I was looking for.
Thanks
Steve