thanks for posting. been trying to update my oiltrax to the newer version but the unlock file has changed from a simple UNL file to a GMA file, rendering the jetmouse unlocker useless. tried the jetmouse unlocker with the above file and it too did not work, downloaded the Garmin Fast Unlocker and it worked great. it asked me to select an IMG file, then took a few minutes of processing before it gave the message that it was finished. I dragged the selected file into the GARMIN folder on the SD card with no unlock file and it works fine in a nuvi 260w. awesome