I find myself in possession of a 2006 Mac Pro 2x2.66 that I got from my local computer recycler for free. The machine boots fine, the only issue with it is that no USB ports work. The recycler kept the RAM, but RAM for this big guy is cheap on eBay; my concern is the USB. I'd like to get the machine up and running to use as a fun experiment machine, but will simply slapping in a mac-compatible USB card work? I realize that it won't give me the ability to boot from USB, but I can live without that for now. Much appreciated!