What kind of hard drive is it?
Most hard drives can be bought independantly from a computer and their websites will probably have some ez installation software to download that will do what you want.
This one works for Maxtor and Quantum
http://www.maxtor.com/products/Diamo...st/default.htm
Although I have used it on other hard drives.
If because of the AGP4 thing you can't install onto your new computer, add your new disk as a slave to your old computer, copy files and then put your new one back?
RD