Thanks in advance for any help you might give me. I have a GPSMAP 496 that I love in every way except one. The internal memory (approx 1.2gb according to Garmin) is not accessible through mapsource or mapinstall. Currently the unit has a combination of flight data and CN loaded on the memory. I would like to be able to use this memory as I wish. Garmin will allow access to it if i download new maps from their site. I can see the unit connected via USB on my system, just can't access it. Any ideas?