The region file is meant to be used in conjunction with WebUpdater which downloads this file directly from Garmin and transfers the file to the nuvi. You can also download the region file (if you have the link) and drag it to WebUpdater. Both methods will do the same thing and copy the region file to the nuvi as GUPDATE.GCD in the x:/Garmin folder. After a power cycle, the nuvi will be updated to the version contained in GUPDATE.GCD, IF the firmware version currently flashed on the nuvi is OLDER.

The direct file update (.exe) does the same thing (transfers GUPDATE.GCD to the nuvi) but does NOT require WebUpdater to transfer the file.