OK, I was able to rename the Nationwide map to Nationwide instead of the tile listing it formerly was. I also updated the name of the MidAtlantic set as well. However, it's still not showing up as a selection in the Montana.
JaVaWa shows the following error for both mapsets, even thought the Nationwide set works fine.
Error: segment codes from this file reside in other files. This will cause problems with routing and/or displaying maps