Reducing Chance Of Civil War.

[Thermal]

I have no problems with Civil War and rarely suffer from it, however I find my CPU counterparts to get it far to much, it destroys the game for me, when the challenge of conquering a would be empire is dissolved, just because half of there land rebelled to disloyal generals. I'm well aware that Faction Leader influence affects loyalty and therefore chance of civil war, but how do i increase the starting influence of faction leaders? (since high influence seems to be past on to future leaders, to some extent, at least).

The Byzantines start at 6, everyone else starts at 4, hence why they rarely suffer from it. I'm guessing the answer is in the startpos files, if so, please direct me appropriately!