was just wondering about this,i just bought the navigon 7100 to replace my tomtom 3rd gen,it would be nice to have topo on my car gps,so i can carry it with me when jeep type trail riding,or hiking,havent been able to find any thing on the net,i do see that some outdoor types will double as a street gps unit,just seeing if i can reverse that. 
thanks
jeff n arizona

thanks
jeff n arizona