I've got a Deluo serial GPS, and use MapPoint 2004 with AGPS. I'm having real problems with the GPS getting lock on sattelites. It's definatly disconnected far more than it's connected, and makes it very hard to depend on for getting anywhere. I have it mounted on the rear board under my rear window. It has a clear view of the sky, as the window it tilted in a hatchback style. I modded the power so that it run's off of the car's 12v via a 5v regulator (so that it is on even when the computer is not), but I don't see how that could be a problem. Any suggestions?