ps can I get it to work with Windows Media Center?
I don't know the current state of that - the drivers you downloaded were written years ago to allow firewire to work with Windows XP MCE and I think they worked with Vista as well. It was a bit of a hack as it would have to record the show using another tuner as well and then somehow swap the firewire created file with the regular file. So you would temporarily have double recordings of all shows. Google around and see what you get.
It should work with SageTV (another PVR software). I use Sage but I only using firewire for channel changing since I can't get a reliable signal from more than one or two channels from my Rogers box. I think it is even partially supported in Sage but I don't know for sure as I use Hauppauge HD-PVRs to capture video/audio.
It may also work with MythTV for Linux. In the past people running Linux or Macs seem to have better luck than Win users.