Connect your device using activesync.
Run Mapsource.
Click on Utilities---->Get Unit ID
Once you get your Unit ID, place it in the top line of the Keygen.
Get your GM XT Device Unlock Code and copy to cliwckedoard.
Go to Utilities and paste that 25 digit code into Mapsource.
On same keygen screen, look for Select Map Product.
Scroll down and select custom map set. A small window will open asking you to input the Map ID code.
Enter 243 in this field.
Get the map unlock code and enter that 25 digit code into Mapsource the same way you did your GM XT Device Unlock Code
This will unlock the detailed maps for the US and I believe Canada. Scroll or pan around to where you want to have detailed maps. Once you select or highlight an area, hit the send to device button and you're good to go. If you have any questions or problems, I'll do what I can to help. I have tested and use this on my Mogul and it works flawlessly.
“ Originally Posted by MarkAtHome 
”
Ah, the missing link! Thanks, Will7272. I had no problem installing the latest Garmin Mobile XT (v4.20.20wp), but thought that your two RAR files would provide me with the detailed US maps I had (incorrectly?) presumed to be missing. The above jinxinlove link doesn't shed any light as to what to do with the Mapsource you provided (and I successfully installed onto my PC). How do I get it to my phones card? BTW, jinx' files are of an older version of the Garmin Mobile XT software.