Unfortunately if you want GPS your going to have to take the plunge... feel free to contact USCC or UTStarcom and get as frustrated as the rest of us USCC members... I would use
http://forum.ppcgeeks.com/showthread.php?t=24511 that's what I used... start with the NoChem's 5060 there are still people on it... I'm currently on NOchem's 5067... I have stayed with him as I know he has USCC in his Kitchen ROMs...