The map installs into Mapsource where you can select it for upload to your Garmin GPSr. The map has a transparent background so your basemap or any detailed maps (Topo, City Navigator etc) you upload along with the trail map will show through. The trail map can be toggled on/off in your GPSr just like any other Garmin map. The trails will appear as a magenta line with white border.

Download and open the zip file...read the READ_ME_FIRST.txt file for installation/use instructions.
Quebec Snowmobile Trail Map (http://www.mediafire.com/?3jq2w2dj4eb)

Screenshot from a Garmin 276c showing how trails will appear on GPS.
http://i14.photobucket.com/albums/a324/rws53/GPS/GPSScreenshot-3.jpg