I've been using some of these maps on my Nuvi 200, experimenting to see which ones have better coverage of New England. Somewhere along the way, I couldn't choose the City Navigator map, it wouldn't let me select it. I cleared out the maps I'd put on the GPS and did a major reset and it works again. Unfortunately, I can only use the Navigator and a transparent map together now, I can't deselect City Navigator anymore and use one of the Topos, even though I could before. I've tried internal or SD card combinations and the garmin map is always on. I don't know if anyone else has encountered this, or if it's too much to ask of and older Nuvi.