All ok whith method 2.
Prepare WebUpdater.
Prepare a folder 'newmap' with gmapprom.img
Create a batch file sendmap.bat in WebUpdated folder

webupdater.exe /i /autorun usb /upload_file rgn=49 path=C:\newmap\gmapprom.img

Connect gps
Launch sendmap.bat
Wait 30 Minutes... and that is all.
Thanks