The download produces an .exe file. If you try to execute this file you`ll get a message that the installer can only install in a GPS device and that you need to have a Garmin account before continuing. Furthermore you have to remove the memory card in the device.
Installation seems to be different from the former versions which created a gmapsupp or gmapprom.img file which could be unlocked and stored at the memory card too. Did anybody found a solution to store the update file at the memory card that you only use it if you really need it. Internal memory of my unit 205W is already full.
Anyway, the file is just 70MB. Remember: Navigasi.net has 210MB and covers all of Indonesia, not only some parts as Garmin does. And the Navigasi.map is not only free, but also much more detailed than all prior versions of the Garmin Map.