@hacsat

The map data inside this special maps in this thread are already unlocked. You will just need to unlock EPM (Enhaced Pedestrian Mode) data in the MMR sub file with FID=800 & PID=1 as unlock parameters for JM KG.

Using an unlocker a 2nd time on files from this thread might corrupt the files.
Downloading a cityXplorer from another thread with original files won't work with nüvi 37xx since FID is not patched in those files.