which version have you installed?
1- use winrar to unzip
2- install using \Garmin_RMU_CNMENT2010\IMG\CNMENT2010Update_ENU.ms i for english
3- use MapReverseConverterENU.exe if you like to use 6.13.7
4- use jetmouse to get your key or use unlocker All to unlock your map under 6.13.7 ver
5- unlock your map.
if IMG use jetmouse keygen and his mapid
u'll find unlocked version IMG too in this thread