I have a Nuvi 500 and I am trying to use OSM maps that are on a micro SD card (2GB).On the SD card,I made a folder "Garmin." Then I copied a "gmapsupp.img" file (619,264 KB) inside the Garmin folder.Then I went to tools,settings,map,map info on the Nuvi.2 maps are selected.OSM generic routable (I think this is the one I just put on the SD card.) And OSM map (1) OSM World Routable (63241144), OSM World ... I think this is a map that someone installed for me 2 years ago.It is a basic map with main roads.I am going to Europe Monday and need more detailed maps.When I zoom into Barcelona,I only see 2 or 3 roads. In my Nuvi built in memory,in the Garmin folder,are about 25 files.Below I am listing some of the larger ones. gmapsupp.img 58,608 KB gmapsupp.img.img 28,316 KB gmapprom1.img 899,984 KB gmapprom.img 1,106,432 KB gmapbmap.img 49,824 KB GUPDATE.GCD 8,987 KB Ecuador gmapsupp.img 5,026 KB KB This is one I probably tried to install 2 years ago while in South America.I didn't work-just had the world map detail. I just don't know what I'm doing wrong.I've read directions several places and nothing has worked.Hopefully someone can see my error and help me.Thanks.

I have a Nuvi 500 and I am trying to use OSM maps that are on a micro SD card (2GB).On the SD card,I made a folder "Garmin." Then I copied a "gmapsupp.img" file (619,264 KB) inside the Garmin folder.Then I went to tools,settings,map,map info on the Nuvi.2 maps are selected.OSM generic routable (I think this is the one I just put on the SD card.) And OSM map (1) OSM World Routable (63241144), OSM World ... I think this is a map that someone installed for me 2 years ago.It is a basic map with main roads.I am going to Europe Monday and need more detailed maps.When I zoom into Barcelona,I only see 2 or 3 roads. In my Nuvi built in memory,in the Garmin folder,are about 25 files.Below I am listing some of the larger ones. gmapsupp.img 58,608 KB gmapsupp.img.img 28,316 KB gmapprom1.img 899,984 KB gmapprom.img 1,106,432 KB gmapbmap.img 49,824 KB GUPDATE.GCD 8,987 KB Ecuador gmapsupp.img 5,026 KB This is one I probably tried to install 2 years ago while in South America.I didn't work-just had the world map detail. I just don't know what I'm doing wrong.I've read directions several places and nothing has worked.Hopefully someone can see my error and help me.Thanks.