Hi again Hilton,
I'm now busy playing with the GPX files from Archie's site and the best way that I've found to send them to the unit is to add them all to one MapSource session then send all the data from that (if you want to be be sure that you don't lose any existing pois from the unit, simply receive them all from the unit via MapSource first then make that session the basis for all the new points)
So, for example:
Open MapSource and select "Receive from Device" then select what you want to have, then save this session as something like my_bkup_points_date (just to be sure that you can retrieve them later)
Now open another MapSource session and load one of the Archie Camping files into it. Then select all the points you want from it (all, if your unit can store them but I advise you just select the ones you want from the appropriate region on the map using the selection tool), let's say that you select all Norway in this example.
Now you've selected all those points, I think it's a good idea to categorise them, so select them and click properties, then assign them a category and icon symbol that can identifiy them uniquely later (so that you don't mess up all the points together) then copy them to the clipboard and go back to the first MapSource session and paste them in there.
There's no reason why you can't add as many as you like then and send them back to the unit (if you hit the upper limit of waypoints, you may have to delete some from the unit) but you don't need to worry about deleting them now, as they are safely backed up on your pc. I'm not sure about the exact procedure for doing this on a NavIII, but on a Zumo you would delete the current.gpx file and the temp.gpx file from the Garmin/GPX folder on the unit.
HTH,
David
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