Help with base camp

[R4auto]

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

[Seldom]

Start by reading this tutorial:
http://www.gpsfiledepot.com/tutorials/how-to-open-maps-in-garmin-basecamp/
Then be more specific.

[R4auto]

My downloaded map won't show up how do I get it in there?

[R4auto]

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

[Seldom]

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.