Excellent Tutorials - One trick I have picked up, if you want to load one or more IMG files from GARMIN Mapsource software, instead of connecting your Garmin unit via a USB to a PC, use 4Gig or 8 Gig thumb drive. GARMIN Mapsouce will download IMG files onto the thumb drive. This gives you more flexibility of loading several IMG files without having any files on your GARMIN unit over-written.