And you can hook up the old drive to a external case.
If it's an "older" IDE drive, I have on the floor of my computer room an external drive case I was going to toss out (don't need it anymore). Put the IDE drive in, plug in the wall wart power supply, plug usb cable into comptuer and turn it on...Vista should recognize it.
If you want it, I'll send it to you for free since that is the least I could do for a man who sacrifices part of his life to protect mine.
If you are interested, send me a private message and we can discuss details of sending the external unit.