Re: Worldwide routable Garmin maps: URL REMOVED

I'm getting some questions about installing more then one custom map alongside each other on Windows (BaseCamp). I'm not too familiar with this process, so I'd like feedback on the workflow so I can update the wiki FAQ.

This is what I've done:
1) request a custom map using the website (OSM generic routable) and download the Windows installer.
2) install the custom map
3) run JaVaWa's GMTK
3.1) select the map named 'OSM generic routable' and goto menu 'Extra' -> 'Change map name and ID'
4) GMTK will show a form and the following values are changed:
4.1) Family ID: enter a unique number, e.g.: 2001
4.2) Name on computer: enter a good description of the map, e.g.: 'OSM Central America'
4.3) Name on device: enter a good description, e.g.: 'OSM Central America'
4.4) Folder name: enter a good (unique) folder name, e.g.: 'OSM Central America'
4.5) Click on the 'modify' button

For every new custom map the same sequence of events is performed, each time using a new unique ID and name.

This process seems straightforward enough to me. However, when I install the second custom map, the map installer will warn that there is already a map installed. This warning can safely be ignored but it is confusing to a lot of users. What can be done to prevent this warning?