Kuri77

What location are you needing maps for?

http://www.miscjunk.org/mj/mp_main.html

I have used this site to download Colorado, Wyoming and Utah maps to my Garmin GSX60 when I was 4 wheeling. More detailed than Garmins maps, but may not be current as to trails that have been closed. Reviewing and mapping on up to date paper maps prior to going off road and knowing the local regulations is the only responsible way to do it. IMHO