Setting up blue tooth phone?

[srebbe64]

I've recently got a new mobile and I need to configure the phone to my beemer (a 330). When I bought the car, 18 months ago, the dealer set up the blue tooth hands free kit to my old phone (I'm a technophobe).

So, I've since got a new phone (Apple iPhone 3g) and the manual says "refer to other manual". Needless-to-say, I can't find another manual. I fiddled with the car this evening and I'm damned if I can suss it out! So, does anyone know what I need to do in order set up my new phone with the hands free kit in the car?