http://www.k-probe.com/rip-shrink-dvd-decrypter-tutorial.php
http://forums.xbox-scene.com/index.php?showtopic=514437
http://www.jlathamsite.com/dvd/quicktutorial01.htm
http://www.360-hq.com/xbox-tutorials-25.html
TouchCopy isn't free, but it allows you to copy stuff on an iPod back to the computer.
Here are some links to download Touchcopy:
1. http://www.download.com/TouchCopy/3000-2139_4-10766209.html
2. http://www.wideanglesoftware.com/touchcopy/