You'll need to setup the Bluetooth Audio Gateway on your computer. There's a tutorial here: http://www.mp3car.com/vbulletin/wire...-speakers.html
I am trying to connect my BlackBerry Curve 8330 to my Win XP Pro carPC to have it make phone calls through the car speakers. The only part I need help with is how to make the audio go through the speakers and the computers mic to pick up my speech. Anyone know how to do something like this?