Locate your save file – Crusader root folder/ Scenarios/ SaveGame. Back-up your saves EUG and CFG file before proceeding. Open the EUG file in a word processing program – WordPad, MS Windows etc.
Locate the four letter abbreviation of your Kingdom example England – ENGL. If you don’t know the abbreviation it can be found at the beginning of the text file under:
name = "NAME_1066" tutorial = no startyear = 1066 endyear = 1452 saved = BYZA
Where saved = BYZA is the four letter abbreviation of your Kingdom. Go to the end of your text file and do a search on tag = BYZA where BYZA is abbreviation of your Kingdom. This is example of what you need to find:
tag = BYZA
lastpeace = { year = 1101 month = october day = 29 }
lastwar = { year = 1103 month = june day = 2 }
badboy = 2.333
form_of_goverment = feudal
Where form_of_goverment = feudal is your current government.
Replace feudal with republican for a Republic.
Replace feudal with Diaretic for an Ecclestical goverment.
Save the file and exit before you start the game.