Ouch. Just because they don't support it doesn't mean it doesn't work. I don't support routers @ work but they do. It basically says it will work, but the power may be reduced.

They do make FireWire PCI external cabinets though. They are not cheap, but if that's what you want to use this card and get full performance, since it is a Pro Tools card, then that is what you may need.
MacBook 2GHz Intel Core 2 Duo w/ 2GB DDR2 RAM & 120GB SATA 5400RPM HDD
Canon Rebel XTI
Google Cr-48 Beta Laptop