Edit:
Because this thread started meandering I'm going to spit it and keep this thread to be mostly about the StarSystemDef error that is discussed about part way down. I'll start a different thread that is more generic about getting a mod to show up, period.
Original:
I decided to try creating a custom race. And for the fun of it, I wanted to go make specific planets and all that. But I'm stuck... the file created for the Faction is not an XML file. So I don't know how to edit things like descriptions or the name I chose, etc, without recreating a character. Also, I am not certain what the "internal name" for the race would be.
Any tips on how to proceed?