Onward

My current project is actually an old project, a play I've been working on for several years in fits and starts. I love the source material, a sprawling and delicately wrought 19th-century novel. But the beautiful language is also my hang-up. How can I turn 720 pages of novel into about 120 pages of script? My inclination is always to make the dialogue more terse, and in many ways, it needs to be. But how can I keep the flavor of the original? How much of the dialogue should be the original author's words, and how much should be my own?

I'm working from the following basic outline:
120 pages total, 3 acts.
Act 1, pages 1-29. BIG EVENT occurs on page 30, heralding the beginning of
Act 2, pages 30-89, with another BIG EVENT on page 90, beginning
Act 3, pages 90-120.
And there should also be plot shifts at pages 10, 30, 50, and 75.

See, I like this kind of structure, although it's very different from how I approached the novel this fall. My past stabs at this play have involved poring over pages of dialogue and trying to write scenes, but without any sense of overall structure. I think I got up to 45 pages of dialogue from 200 pages of novel, and I wasn't even into the really meaty parts. I think there will be some dropping of sub-plots, some tightening of focus. We shall see. It's fun to have a new project, at least.