I can put the img file on the SD card of my Nuvi 2555lmt and it needs to be in the garmin directory named gmapsupp.img.
I did create a unl file for it using PID 1, FID 2568, region 0,0.
What is strange is that Homeport easily sees and views it and claims it is not lockable. But the Nuvi says the file is locked when I try and access it from my GPS.
I tried using fastimage unlocker on it but it cuts the file in half to 700 MB and Gmaptool reports errors when I try to install it to mapsource.
Any solution as to how I can unlock this file and enable me to use it on the Nuvi? Homeport can't send it to a device as that function is disabled in Homeport.