I have a G4 with "locked" zones. That is, since I bought it in Europe, I can read and burn zone 2 DVDs only. (In fact, you are offered the chance to change zones 5 times before the machine blocks changes). The guy in the shop where I bought it said "oh there are lots of places on the internet to download programs to enable you to read all zones" (and burn in different zones?). I have had a look, but they all sound difficult to install and most end with a very scary warning: THIS MAY DESTROY YOUR DVD PLAYER. Yikes! Anyone know of a good, reliable piece of software (doesn't have to be free) that could help me out?