A VERY rough proof-of-concept for arranging the footage in such a way that I don't need to use the SE shot of the Falcon taking off...

https://vimeo.com/123892623

(Password: fanedit.org)

I've taken two shots of Chewie and Han from later in ANH, reversed them, cropped the shot of Chewie and done a rough auto-chroma-key to add a random shot of a desert, animated to look as if the Falcon is lifting off. Obviously the finished shot would have the hangar bay and be matted by hand. Also I'd add SoundFX of Han rushing into the cockpit while the camera is on Chewie to really "sell" it and engine noises to properly time with the new sequence of shots.

Almost forgot, I retimed the shot of the Troopers so the Falcon flys away a little later.

I think this could work :-)