@fcunha79
I would leave your Brazil map as gmapprom.img and place the CNNA in a Garmin folder in the root of an sd card, named gmapsupp.img. That way if any problems just remove the card and nuvi functions normally. A 2nd map in sd will also work as gmapsup1.img if you've updated your fw recently. If you want to you can put it in the unit's Garmin folder, see here: [Only registered and activated users can see links. ].



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