Hi, I intend to purchase a Garmin 555S Plotter and am getting some G2 Bluechart torrents. They seem to be in GMAPSUPP.IMG format. As a relative newbie to this format (im used to unlocking within mapsource for teressterial gps's) can anyone give me a simple step by step method of unlocking the G2 Vision charts. Please treat me as a beginner.
Thanks