I cant post some screen from my mapupdater, sorry they're in italian
after attaching usb your unit, run mapupdater.
It will show some screens where you must choose if you want all the map or just a part of it
after downoading and installing you'll have the map in Mapsource, ready to send imgs to your device, alternatively you can install it on both : on pc and gps.
Or just in gps
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