I had very similar idea for an edit, so I can't wait to see your work.
I have some bad news, however. I tried to recreate the missing dialogue from the scene where Biggs and Luke reunite on Yavin amd it seems the footage on BluRay and the shot used in the SE are completely different takes of the same shot. And of course the BluRay doesn't feature the shot in full. Thus I am afraid this scene can't be put back where it belongs...