You'll want to search for the exact name of the drive and the terms 'firmware' and 'mac'. You'll probably find a firmware patch that makes your drive region-free. You'll also need a little tool to set the region preferences back to 'five times', as the counter will still go down. It's all available on the 'net.
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.