The Pope: I made this campaign mod because I wanted to play the Pope and it is not intended to be Historically accurate.
Basically I just made the Pope Faction playable and raised the base income for the two territorries they start out with. I also added Burgundy as a Faction (not playable) and took out sicily. I made much of the territory in and around Italy Rebel controlled to make it easier on the Papists, the Italians are now just Venice and will have a very hard time in the game but I gave them a lot of extra money in the beginning of the game. That about covers it.