why do they want a 'dvd'? what do they want to do?
dvd's are copy protected - if they are commercial.
other than that a dvd is just a movie. and it can be transcoded to something a lot more usable in pixelmad.
there are several programs out there that will convert dvd's to movie files-
mac the ripper:
http://www.versiontracker.com/dyn/moreinfo/macosx/22715