injinuity,
I also have a PAL xbox. However, there are certain games that are supposed to be encoded in 1 region but can be playable in both regions. Example would be a NTSC halo 3, Gears of War, Call of Duty, Rainbow 6, Guitar Hero etc. Although you buy the games in the US and are labeled as NTSC, you can play them on your PAL Xbox. These are what you call region-free. Again, they might be labeled as NTSC or PAL but playable to both systems.
injinuity,
I also have a PAL xbox. However, there are certain games that are supposed to be encoded in 1 region but can be playable in both regions. Example would be a NTSC halo 3, Gears of War, Call of Duty, Rainbow 6, Guitar Hero etc. Although you buy the games in the US and are labeled as NTSC, you can play them on your PAL Xbox. These are what you call region-free. Again, they might be labeled as NTSC or PAL but playable to both systems.
To check their compatibility, go to http://www.play-asia.com/paOS-00-3-xbox360_compatibility_guide-49-en.html
Hope that helps.
regards,
Chris
http://www.lifeonthespot.com