I got this working with my nuvi 1350, I created a Map directory on a microsd card which is where I have the latest maps and got the key from the jetmouse program, worked like a charm. I think alot of folks are confused as to what to name the unl file. cityXplorer NA 2012.20.img and cityXplorer NA 2012.20.unl is what I have in my map directory along with the CXNA.img file. Works great and thanks for the great directions!