I used to have a Desktop DAW with an Intel DP35DP motherboard. It has a T.I. chipset firewire interface. I had a Focusrite Saffire Pro 40 that worked perfectly with that motherboard (in Vista and early Win 7).
I don't recall from the other thread. Is there anything showing up in the Device Manager, either with an error code or an unknown device? If not, that says Windows is not detecting the hardware and if Windows is not detecting it, forcing a driver install will do no good.