Search in maps section, if it's a IMG map add directly in garmin folder on phone ,unlock it if locked following this guide
[Only registered and activated users can see links. ]
rename new map GMAPSUP2.IMG
if mapsource map you need a pc with mapsource software and garmin unlocker if the map is locked.
you'll find in gps tool section with instructions
good luck, pm me if u need help
try to find more specific instructions [Only registered and activated users can see links. ]
Bookmarks