Carl is not exactly correct.
He is correct that the Apple DVD Drive/Player is capable of playing DVDs from any region out of the box.
This region code is set when you try to play your first DVD. Then you have 5 more times to change the region code.
On the 5th time the region code will be lock to the Region you have set it to.
Detail explanation can be found in Apple's Support Article: "
DVD Player: About DVD-Video Regions".
Your alternative is to use what Bob Maher had suggested, the program called "
VLC Media Player" or "
MPlayer
I hope this helps.
-- Vinko
G4 Dual 500MHz Mac OS X (10.4.5) 2G iPod Mini 6GB