advice on hardware setup needed

looking for advice on hardware setup for GPS

will soon have O2 xda mini s & would like to run GPS on it, prob Alko Co-Pilot because bro in law has it & i know it works in Europe- unless some one can convince me otherwise?
i also have a pioneer bluetooth head unit for hands free, so:
can't run 2 bluetooth devices off phone so is it possible to run cabled receiver in car, then bluetooth receiver out of car or do they need to be setup each time i use them?

working away from home for 2 weeks so may not be able to reply straight away but any advice appreciated as i don't want to spend money on hardware that causes probs

thanks old'uns