As of July 2011, You have the chance to purchase Addons for BackCountry Navigator in the form of trail maps.
These are not maps all by themselves, but can show colored trails and waypoints on top of whatever map source you are using.
Got to the menu item called "Purchasing AddOns". The menu button on your phone may look like four straight lines.
The menu item mentioned will be under the 'More' submenu.
You will see a list of possible addons.
If you have already purchased something, push menu button and then select "Restore Purchases" to force a reinstall.
If not, you can go to an individual page and purchase.
You will then see some progress in your notifications.
Look to see that the install completed successfully.
At this point, you may be wondering what this trail map will do, where you should look for it, etc.
You can see the trails marked on whatever map you are using.
Try centering the map on a place that should have trails.
For example, search for Ephraim, UT and look east to see many of the ATV Trails.
To preview coverage for ATV trail maps, for instance, go to:
I centered this map on the Washougal River to see a whitewater trail near my hometown.
You can use the [+] button to identify markers and see attributes of the trails.