Hi catymag

I've read this now from front to back. Correct me if I'm wrong, but first you unlock the .img file that I got with the download (which I've done) but do I delete everything on my GPS and drop the file all by itself or do I delete only the .img file in the maps directory and replace with the new unlocked one? The 'how to' is not clear on this, it only says to drop it on the GPS but not specifically where. Thanks again mate.