AFAIK, no there isn't.  The editor lets you make new kingdoms, but not edit those either.  Once you make one you are stuck with it unless you delete it.  However I do write my custom kingdoms text and custom Sovereign text blocks in notepad.  You can't copy them from the game interface but you can copy TO the game interface.

MyDocuments/MyGames/FallenEnchantress/Units is where units you create in-game are stored. If you look at the XML it is pretty self explanatory actually. Just ask if there is something you don't understand.

Now that I think about how do you edit a sov's attack and defense stats? I have not found the code area needed to do that. I can add in abilities and what not just fine but cannot for the life of me find out how to raise the attack stats. I want my ultimate OP sov that can rule all with his fists, where I can autoresolves against dragons and large demons with no worries.

Sweet I shall look into ths.