How do you name custom units?

[JMBuilder]

I'm making some custom soldiers in the Breed Editor, but I have a problem. You know how a little title pops up in the bottom-right corner if you hover the cursor over a unit? It'll say "rifleman" or "machine gunner" or other things depending on the unit. How do you give these things to custom units? There's no way to edit the descriptions and the title on the lower-left unit portrait just ends up says something like "desc/human/mp/ger/mgun2". I would much rather it say "assault gunner."