salsbst,
A while back it appears that you had sagetv setup with girder, with usbuirt blasting to your cable/sat box. I am in the middle of a move to windows 7 64 bit and am forced to move off of 1394 channelchange to use the blaster. How did you have this set up? I am an experience sage and girder user, so you can be technical. I went this route because I am likely going to move to a hauppauge cable card before long and need an interim solution.
I am guessing that you have to use multitunerexe to send girder events. I presume you have to setup girder 11 girder actions that are all the numbers and an enter for the cable box. Even though sagetv has USBUIRT support, I am guessing that girder and sage cannot share the device at the same time.