I installed an unlocked City Navigator Europe 2014.10 using a patched Basecamp v4.1.2 onto a 16 Gb microSD card using the mapinstall software (I installed it by plugging in the nuvi 350 to the USB port and doing the 3 hour approach). Now I can view the map on my computer when I have the nuvi 350 plugged in and Basecamp will read it through the SD card, but on the nuvi I'll hit Settings>Map>Map Info and the only one that is there is the North America one that came preloaded on the nuvi.

Problems:
Can't view Europe map stored on 16 Gb microSD card (with adapter) in GPS unit (nuvi 350), but can view in Basecamp when connected.
Only US map shows up in Map info screen

I tried using the search function and reading the tutorials, but none addressed my problem.

Thanks for all the help!