$10 PCI card that has 3 firewire ports:
http://www.newegg.com/Product/Produc...82E16815104226
(It will be very easy to install, put drivers on PC. Shut down, open up the PC case, unscrew PCI bracket, push the firewire card in, and turn the PC on - remember to discharge your self of static before doing anything inside the PC.)