Hello Steve,
My Mum got me a hands free kit for xmas and i am goin to set it up tomoro.
Basically youplug it in the ciggy lighter and put your phone in the cradle and clip a mic type thing to the ear piece, Then you tune your radio to a channel specified on the case and when someone calls there voice comes over the speakers in the motor.
Tell you how it goes tomoro, :-/
Mikey