Let the hive mind of Engadget get that for you.
"I am looking for a device that will stream sound from one source to several recipients. For example, I want to stream sound from my TV or stereo to my phone or MP3 player that has radio and Bluetooth capabilities. I have looked into radio transmitters and they seem like a decent choice, but I can't find one that uses external power (USB or from the plug) and I would want one with a transmit range of around 50 meters. Thanks!"
@Scott:
What you should have done was install vista and service pack, etc, then ghost and save your HDD image. After that you can experiment all you want. If you fail, you just ghost the vista "fresh install" image back to the HDD and save time.
Also, you can try searching for QAM channels using the native Hauppague 1600 tuner application (if it has any) to verify that the problem is media center.