1) Extract the 'exe' file again, e.g., type3.exe
2) Copy files 'gmapprom' and 'JCV' from 'mapdata' folder to your 'Garmin' and 'JCV' folders accordingly
3) Use Garmin 'keygen' to generate the unlock key, copy/paste and save as 'gmapprom.unl' file via 'notpad'( you need 2 input 'FID 2504
' and your device id')
4) Copy the 'gmapprom.unl' to your Garmin folder
Done and enjoy!