How to share the namemapping and script file across multiple projects

Whats worked for me is merging the name mapping files.   Add NameMapping to the project then right click on the NameMapping file and select Merge with...  then navigate to the NameMapping.tcNM file in the other project.  The files are no longer linked doing it this way, but can be re-merged later to bring everyone up to speed and this way I can deploy a single project to a test machine instead of all the project suites.