If you need JCV download NTU, JCV for Nuvi 50 doesnt exist for NT map as lolypop wrote above.
I downloaded 14 rar files that you linked from thread [Only registered and activated users can see links. ]. I think I downloaded wrong files since I think I need to have map in .img
Last time I downloaded version 2013:20 it was a .img file and it works fine.
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