I repeated my steps again tonight but made one change when running Garmincure3 the second time.
For ORIGINAL, I used an rgn file that Garmin sent me for the 760. This rgn file got the device to where I have menus. I then added GMAPBMAP from my Nuvi 50 and I have maps now. The only features I still need are Address and POI. Both buttons say "No Data Available". So, are there files I can copy from my Nuvi 50 for that? I copied over POI folder from my nuvi 50 but that didn't seem to change anything.
Where is the Address info kept and how do I get that initialized so it works?