I have iGO Primo installed in the NAND Flash on a PC*Miler 430, with maps on a 4 gig SD.
Getting the maps working was easy, just change 0 to 1 in has_secondary_root with the maps in igo\content\map on the SD
What is proving to be a problem is how the GPS receiver is connected in this device. The port was set to 2, didn't work. All the other WinCE 5 GPS receivers I have ...