I'll be glad to help. The instructions on the gps file depot site are pretty good, and so is Garmin's Basecamp software.

I think it's a little different on a Mac than a PC, and I'm using a Mac, but they're not that different. For Mac users that Basecamp software is a real treat. For years we had doodley squat for GPS software and right now there isn't much else I know of, but Basecamp and those maps work pretty good, and it gets what I want most done.
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"You want to go where?"