The Garmin nuvi 260 GPS shows up as 2 FAT drives (internal flash and SD) when connected with a standard USB-miniUSB cable.

• Gentoo hardware wiki, with some general info
• How to install this site's Malaysia/Singapore maps
• Creating custom POIs wiki
• The Web Updater will of course update your firmware, but it can also be used to add voices, including the British English Text-to-Speech, so you can pretend to be James May on Top Gear.

1. Get vehicles from http://www.garmin.com/vehicles
2. Attach device, it shows up as a drive.
3. Move raw files to X:\garmin\vehicles\