Actually the link I posted is a hub that plugs in to a USB port. it takes a power supply. It has one firewire connection on it. The only output on the hub goes to a USB 2.0 port. Now all of a sudden the link no longer works.
I have been reading about these adapters, The power requirements for Firewire is higher then USB. Some people have fried hard drives using these things. I think it would just be better to get a Firewire card.