B.N
yes, it is usually 5 changes, after which it locks to the region code for the last DVD played.
The program I mentioned above, bypasses the region coding on the computer (which is totally legal to do), so allows any DVD to be played.
It even works if the 5 changes have been made, and the PC is locked to one region.
What BEagle was refering to was "CSS Free", which is supplied at the same time as DVD region free. This program allows copying of encrypted DVD's.