HOW DID YOU DO THIS?
i wnat to put my second neohwes on the papal throne
I detailed this in a bug report thread, hopefully it will be fixed in the next patch.
My wife, the Countess of Spoleto (formerly the Duchess of Tuscany until some bugger pinched her title) started a war of independence from the Holy Roman Empire during a bit of a succession crisis. However, the current Pope then used this as an opportunity to declare war on as her de Jure ducal liege. Long story short, his army got there before either mine (which was currently fighting a crusade for Jerusalem) or the Emperor's. She lost, and he became her liege.
Then a few years later, for some reason she started a war to overthrow her liege. The friggin Pope. I helped her win, thinking it would let her claim independence, but instead the current Pope was deposed and replaced with her 'preferred ruler'. Herself.