@tomigonzo

So you update your device with my pack and your nuvi now see 3D buildings and 3D terrain?
If you still can't see your device in updater window then install this drivers like Caty suggested

Spoiler: Garmin usb drivers
http://www8.garmin.com/support/download_details.jsp?id=591


Install this drivers and then folow tutorial and updater will recognize your device.