Nice work mbrking, I don't know how to do an item/weapon editor so I can't add that :( maybe Jappi88 can add that...
For those having an UNKNOWN Difficulty it is because on saves that are further in the game the Difficulty doesn't go by 01-03, it goes by 9D-9F. I didn't know that when I coded v1.4, but I will have that fixed for v1.5.