Since I got my new MP I am intending to sell the old one. Currently, the original HD that came with my old MP is in my new MP. I already moved all the files off of it. Can I just install OSX on that drive while it is in my new MP by inserting the DVD and booting off of it and then just put OSX on that drive? Then, take it out of the new MP and insert it into the old one? This should work right?