Tim / Josh --
You may be interested in https://svn.open-mpi.org/trac/mtt/changeset/
953. On the jms branch, you can now add your own .pm files
containing funclets in the MTT section of the INI file. This can
make a lot of complex logic in the INI file itself go away (i.e., put
the logic in a funclet instead). So you can add one or more files of
funclets (e.g., split by cluster?) if it's helpful to you.