Yep try this one
http://www.afterdawn.com/software/vi..._decrypter.cfm
DVD Decrypter
and then I'd get the DVD Xpack that allows .VOB file playback
on Windows Media Player
http://www.intervideo.com/jsp/DVDXPack_Profile.jsp
Those two should do it, you can rip the DVD into one large .VOB
file and enjoy in flight.