Hey. I entered the hidden menu recently on my N3 and saw that there was an option to change the region lock.
To Access the menu (taken from another thread thanks to JAvicN2):
REMOVE DISK
HOLD RESET AND EJECT
RELEASE RESET BUT HOLD EJECT
SCREEN WILL GO BACK IN AND OUT-THEN SAYS PLEASE PRESS THE RESET BUTTON…DON’T
THEN WITH JOY PAD PRESS …
UP,RIGHT,UP,RIGHT,DOWN,RIGHT,DOWN,RIGHT…THEN OK (JOYPAD BUTTON INWARDS)
PASSWORD SCREEN WILL COME ON SCREEN BREIFLY
TEST MODE SCREEN APEARS-CLICK JOYSTICK TO RIGHT ONCE
BUTTONS
OK = JOYPAD INWARD
BACK = JOYPAD TO THE LEFT…N