I changed the firmware on my old 15" powerpc powerbook superdrive, and then used region x and it's now region free.
You have to find a modified firmware for your specific drive model before you can play any region. You can then use RegionX to change your set region whenever you want, and reset the change count back to 5. Do a google search, it won't take you long to find out if there is a firmware available for you or not.
Having said that, it took a long time for someone to come out for a firmware for the drive in my specific Powerbook. And I'm talking years lol