Wow. It really was four in the morning.
After doing some research, I discovered that I can absolutely call my Rakshasa Monk a Monk and not some special name, and it's spelt 'Lych' in this universe.
That, and after reading some of David's modding guide here
, I've discovered I can do some pretty cool stuff without much hassle. All I need now is to get a handle on the sprite sheet (which hasn't been posted at time of writing) and I'm away laughing.
Also, this is a minor thing, but I can't seem to find where the game stores the files for the base classes. I'm guessing it's buried somewhere in the executable itself and otherwise unattainable.