4. Copy the unlocked gmapsupp.img-? file from this torrent into the Garmin folder on the device.
5. Restart your device and check your map info via : Tools]Settings]Map]Map Info.
If you have any problems using gmapsupp.img, try renaming it to gmapprom.img. I use a Nuvi 750 and haven't had any problems with it being named gmapsupp.img.
Also, this file will work from a SD card just as it is. Copy it to your SD card, put the card back into your GPS and follow step 5 above.
Link Rapidgator :