I am trying to change the effects of becoming shogun, to switch from regular guard to takeda guard as the unit that appears. I tried to just type over the name of the unit, but there seems to be no way to save the file. All the changes to editing.lua disappear as soon as I close the PFM. Is there a way to permanently modify that? Will it work in the middle of the campaign, with save-game, rather than starting a new campaign?