Don't run the .exe, just un-rar it (i use 7-zip or winrar) to extract the files & the MapData folder. Open the MapData folder, in it you will find the image file, gmapprom1.img. Rename it if you want after backing it up. It is locked, so unlock it with [Only registered and activated users can see links. ] and then you can use it. It is better not to put this kind of map in your unit. Put it & the jcv in your sd card for safety.