I want to put a hard drive from one machine into another without formatting. I have a macbook pro 6,2 with an ssd that I am no longer using for work. I want my wife to upgrade to that macbook pro from her 13" white macbook. She has a relatively new seagate 500gb ss+hd that is set up quite nicely. I want to put that drive in the MBP and use the ssd in my new workstation. Can I do this and avoid reinstalling all her system to the ss+hd?