So... I looked into this, and I found that MRIcron's documentation does not seem to contain any instructions on how one would make a .txt file to go with a template to enable label lookup.

Simply making one that looks like AAL's and putting it into the same folder does not actually appear to do anything.

Dirk, if you can point me to a resource that elaborates on how to integrate custom templates into MRIcron, then I'll be happy to give it a shot for the INIA19, but for now I am at a loss as to what to do.

Best,
  Torsten