I am not sure where I should post this, so I appreciate your patience if this is the wrong place. I have an iMac G4, on Jaguar. I received a DVD, and when I put it in, I got a message window that said I would have to change the setting to Region 1. Will that screw up everything? Is it reversible? Also, on the same note, if I were to purchase a movie on DVD from somewhere in Europe, does that mean that it will not work in my computer, because of that same Region 1 issue? Thank you.