OK, so I'm very interested in upgrading the hard drive in my MacBook, and I know they are 2.5" form factor and the best I will get is 100 GB with 7200 RPM or 120 with 5400 RPM (btw, if anyone has suggestions about where to purchase, a link is always appreciated!). My real concern is how will I get the files from my old HD onto my new one. And I don't mean Word documents, but the actual programs and OS. Will I be forced to reinstall X and all programs, or is there a way for me to say, make an image of my old hard drive, put it on a firewire drive, and then burn that image onto the new HD? Thanks!