Thanks spijun
As usual
Map with FID 4594 is for all the devices- presence of the digital signature (gma protection).
map with fid 1281 is for old devices :2XX 7XX
map with fid 1790 is for new devices ,is needed for buildings adress search

How to decrypt and extract the .img? [Only registered and activated users can see links. ] post n6
Uncompress,run fxor, in hex editor replace A with D ( DSKIMG instead of ASKIMG)
better to use innounp.exe latest version to extract
Code:
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and this tool to decrypt
fxor.rar
[Only registered and activated users can see links. ]
or
[Only registered and activated users can see links. ]