@catymag I diden't try your method because I always use MapSource program to generate a custom maps. All people don't need the whole maps in garmin devices. I't slows down a processing of device and maps sometimes interfere with each other. I think it's better to create your own custom map with MapSource an then transfer it as on .img file alwready unlocked in MapSource with JetMous generator. This generator still works even for the new maps like City Navigator Europe 2011.20. I haw totorial how it's done with MapSource. Try to look for my web page.