Digitally, I'm skeptical of this and don't think it will work. I don't think it's quite as simple as getting a cable that matches up the pins. You would probably have to do a lot of messing about on the PC side to attach a Firewire device through a usb port. Plus, if your computer is only USB1.0 i can guarentee it will not work with your camcorder, as the data transfer speed is well below that of firewire, and the camcorder will not be designed to deal with throttling the transfer (jumping back and forward on the tape, transfer buffer, etc). So, analogue summary is, I'd sell the card and buy a proper firewire card.