Hello Catymag,

Nice site you have, I have this nuvi 750 I have read all the posts here and have tried to unlock this "City navigator NA NT 2010.1 " on Mapsource 6.15.5 I did what I was supposed to do but it will not unlock the map ? with your Gunlocker installing it in Garmin and exe the files ? puzzled ? I see some peeps also say they cannot do it.. could this be an update map ? Also I can not seem to load the orig map from the device to the computer Mapsource how is that done ? even though it is an older 2009 map of NA I thought I would like to see on the Mapsource, using win xp, one more thing I had to trick the uploading of mapsource to this computer as it didnt have a DVD player to load from the orig disk of Mapsource that was on the DVD. any help will be appreciated..