I downloaded Great Lakes off road map and base camp but the map isn't showing up in base camp. What am I doing wrong and how do I do it
Start by reading this tutorial:
http://www.gpsfiledepot.com/tutorials/how-to-open-maps-in-garmin-basecamp/
Then be more specific.
My downloaded map won't show up how do I get it in there?
the map i down loaded is in (.exe) and when i click to import into my collection the format dosent except (.exe). how do i change it to allow it. or get the map in to basecamp to install on my garmin nuvi 1390
Doesn't sound like you've read the tutorial. You need to run the EXE so it INSTALLS the mapset. You don't IMPORT it.