Do you have a FireWire 800 drive? Wouldn't it have come with a cable?
Or is this to transfer between a G5 and a non-FireWire 800 machine... which begs the question - wouldn't ethernet be faster?
I once plugged a usb 2.0 card bus to my tibook and it worked without any drivers. However, I didn't see any huge improvement in speed. A usb2.0 disk was plugged.. And there are firewire pc cards available.
Nah this one is a Lacie D2 8x but at the moment I can only write at like 2.5x cos I need a Firewire 800 card cos at the moment I've only got Firewire 400
Well, 2.5x would need max 2mb/sec. 8x would be at <10mb/sec. Firewire 400 makes max. 50mb/sec. I don't think your problem lies on firewire 400 but maybe on your media or your slow harddisc/system.