For those with problems upgrading WinCE. I've had this problem.. Just format the sd card in fat32, copy the two files, power on the radio, when the logo appears, push the four buttons (Menu, Map, Eject and Reset), wait like 5 seconds, leave the reset button, shot after that, release the Eject button, wait for the blue screen, release the two other buttons. On mine, i'd have a "please restart again" message, but i've been capable to entering the code. Enter your SD Card, Select WinCE Upgrade, Select SD Card (Format), and it will takes about 2 minutes to reflash the WinCE.
Hope this will