I have two GPSlim 236 units, one for each car, becuase I never seem to have it in the right car when I need it. But I found that I can't have them both configured on my phone at the same time. I have to remove one and then pair the one I have and setup the input and output com ports. This is kind of a pain. I see in the phone it says manage GPS Automatically, what does this mean? It doesn't seem very automatic if I have to setup the ports. Am I setting up the incoming and outgoing ports and don't need to?

Does anybody know of a cable that I can use to power and connect the two devices so I don't have to use the blue tooth?

Treo 700wx Verizon model, GPSlim 236 Holux, TomTom software.