MacScreenStack is a Hypercard 2.x stack that assists a screenwriter in creating the structure for a successful screenplay according to recommended principles described in the workshops and publications of Syd Field and many others. MacScreenStack improves upon the "index card" method used to construct a scene-by-scene storyboard for use as a writing guide in drafting the actual narrative of a script. MacScreenStack is freeware and may copied and be re-distributed. Keywords: HyperCard,stack,freeware, screenwriting, script,screenplay,movie,writing,film. Use DD 3.7 to decompress.