Some 3790 tester needed for this-
Unlocking enhanced pedestrian navigation (in Nuvi3790 too):
Use JetMosue Keygen to create unlock code for your Unit ID and Custom Mapset with MapID = 800. Write unlock code to text file with name Frankfurt.unl.
Copy files Frankfurt.img, Frankfurt_3D.img and Fankfurt.unl to Map directory on your nuvi or SD card.

[Only registered and activated users can see links. ]

credits :ternic4