Quote:

Commercial DVD's are generally Region Coded. This is done to try and protect the release of new movies since they are generally not released simultanously around the world.

<snip>
Seven regions (also called locales or zones) have been defined, and each one is assigned a number. Players and discs are often identified by the region number superimposed on a world globe. If a disc plays in more than one region it will have more than one number on the globe.
1: U.S., Canada, U.S. Territories
2: Japan, Europe, South Africa, and Middle East (including Egypt)
3: Southeast Asia and East Asia (including Hong Kong)
4: Australia, New Zealand, Pacific Islands, Central America, Mexico, South America, and the Caribbean
5: Eastern Europe (Former Soviet Union), Indian subcontinent, Africa, North Korea, and Mongolia
6: China
7: Reserved
8: Special international venues (airplanes, cruise ships, etc.)
</snip>

There are some "all region" coded DVD's, and some players that can "change regions" or have "all regions". Mind you there are some DVDs that attempt to thwart multi-region players.

@Spidey:
Are you going through the icon tooltypes or command line options? I just go through the tooltypes and I set the DVD_TITLE, DVD_DEVICE and DVD_UNIT. (Not 100% if those are the tooltypes since I'm not near my Pegasos at the moment. :P)