[Beanamir of Gondor]

Well, first off, Faramir and Denethor would get into a screaming, hair-pulling fight, in which Denethor would begin to weep, and then start throwing tearful insults at Faramir. "You're such a disappointment as a son!" Then Faramir would get all mad ("Well you're a failure as a father figure!") and start crying again, and fall on the floor... Then Gandalf would jump in and tell off Denethor, and Denny would run off into his chambers crying. "That wizard is so mean!" Then Pippin would follow Faramir out and they would have a nice heart-to-heart talk about Boromir (Faramir would cry again), and then Faramir would have a noble moment and go off and get shot.
Everything after that is just like it happened in the movie. Boo hoo.