If it's an old NA, delete gmapprom.img along with the unlock files gmapprom.unl and gmapprom.unl.old. Also ditch the old JVC file and then dl the correct matching file for your current map from the NA thread, as Caty said any old additional files won't work with your new NA map. It looks like you've grabbed the current gmap3d.img by it's date though. You can delete any old *.sum files too, they're not needed. If the files and folders showing modified year of '99' aren't causing any problems in the device's behavour, don't worry about them. Millennium bug strikes late? ... lol. If your nuvi acts strange just hard reset it as first aid. You should do that occasionally anyway and always particularly before and after fw updates. Backup favourites etc first.
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