Movix is a software which allows to play Audio/Video files and create bootable,autoplay CDs.It's small linux distro and u boot from it's CD and then remove the CD and then u can insert Audio/Video CDs and start playing it without worryin about PC's OS!It plays almost all formats.
Movix2 is a GUI based Linux Distro with Mouse support.You pop the CD and boot from it and remove the CD after booting,You have nice Media Player which plays all multimedia files you want: DVD [no zone constraint], VCD, DivX, avi, mpg, mp3, ogg etc.
Check out:-
http://movix.sourceforge.net/