Quote Originally Posted by MarcusAureliusAntoninus
You can't change those settings midgame normally.

There was a savegame editor called RomeSage that could do that, but IIRC it had problems when modding mod savegames. And even on vanilla savegames, editing them caused the game to be a bit less stable.
Yes i second that i tried it last week and it wouldn't even let me to load the new created savegame