Convert srf files to png and back to srf. You may thus edit the vehicle image of
(some) Garmin GPS devices.

See http://myweb.cableone.net/eviltwin69/Garmin_srf_to_png_file_conversion.html
for the long explanation.

Some SRF files: http://techmods.net/nuvi/vehicles/

Keywords: Garmin, NUVI, GPS