After I save a gmapsup1.img map in the Garmin directory on the memory card, should I be able to see it on the list of available maps on the nuvi Map Info page? My nuvi 760 doesn't list a map if it's named gmapsup1.img, but it has no problem seeing and using a map if the map is named gmapsupp.img or gmapprom.img.
I saved the new Eastern US map named gmapsupp.img onto the memory card. If I rename the new Western US map to gmapprom.img and save it in NVRAM (replacing the existing gmapprom.img), then select both maps on the nuvi Map Info page, would the nuvi be able to use both maps when calculating routes? I occasionally travel back and forth across the boundary dividing the two maps. Thanks in advance.