I know I'm late replying. It was supposed to be part two that I linked to. However, while I posted the wrong link, Peter also failed to notice the link at the bottom of part one that would have taken him to part two. As Neil discovered, both methods work. I wouldn't have posted them if they didn't. I know they work because I personally have used both in unlocking my map downloads direct from Garmin. But Garmin Image Unlock is far faster.