Multiscreen? Sounds like a messy way to go. Rather than trying to follow the entire film shot by shot this time, compile your clips and let their rhythm dictate your work rather than letting the rhythm of the film dictate it. You can always repeat audio, use alternate audio and music, and let the sequence play out as longer or shorter depending on what you do.

By the way, I've just figured out that the clip seen in the end credits of Empire of Dreams, of R2-D2 cleaning Luke's X-wing, is from Return of the Jedi. I thought it was from Empire, but in the establishing shot of Dagobah, you can see a wide angle of R2 doing just that!

To blur a portion of an image, you create a duplicate of the image and place it over itself. You blur one of them and crop it, with a feather around the edge.

The trailers will give you a few alternate angles, including Luke saying "Is Darth Vader my father?"