To use the SCG route install it as normal.
then use the garmin unlocker .\tools\GrmnUnlckr\all.bat
it will unlock every single garmin map u installed in mapsource
to send the maps to the pc,mobile, or garmin device
choose the maps u want in mapsource and send it to your device
then use the keygen (map ids are in the map_ids.txt) to create the code to insert in the GMAPSUPP.UNL file
and put this file in your C:\GarminMobilePC\ folder (or X:\Garmin\ folder for a SD card (mobileXT or Garmin Device))