I'm planning on selling my current Macbook Pro and buying an iMac. I originally bought the MBP while living in the US and so have changed the DVD Region a few times while converting all my US DVDs to digital etc. But now for the resale, I'm a nice guy and so I don't want to screw over any buyer by only leaving them one region swap etc. Is there any legitimate way to reset this Region count for the benefit of a future buyer? While obviously keeping my warranty etc valid.