I installed I Guidance 1.1 for laptop yesterday. I have a serial Garmin GPS16 through Keyspan serial to USB hub. Street Atlas 2003 found the GPS receiver and works fine. After successful I Guidance install, I ran the program. It opens up and runs fine but as soon as I tell it that my GPS receiver is on COM4 it crashes. It crashes so bad that it took Windows XP with it and blue screen out and then memory dumb. I disable the memory dumb and now it reboots when I assign the program to COM4. Does anyone know something I dont know? Please help if you can or else I'm just gonna toss this to my pile of useless software.