catymag - first, thank you for moving this to the appropriate section. Second, ok I downloaded gmaptool (for a pc, the Mac version said it was experimental and the author wasn't really sure if it worked or not). So how do I check (on my pc) to see if my file is unlocked, and what exactly did you mean the path must be SD/Garmin/gmapsupp.img? I'm starting to see I have a lot to learn here.