I'm not exactly a wiring whiz, but I'd like to use my TomTom GPS with my motorcycle. can anyone suggest how I might be able to connect the cigarette lighter hookup from the TomTom receiver to my mc battery? (I am less worried about the Treo running out of power than the TomTom unit, since in my experience the GPS seems to eat up far less of the Treo's battery than the satellite receiver's.)