I Frankensteined together a scene featuring clips of Lupin's dialating eye intercut with a couple of shots of Sirius from elsewhere in the film. It's only a few seconds, then cuts to Ron waking up from the "spiders" dream. It makes his awakening more like a dream, but in reality, Black was right there in the room looking for ... well, we know who in the end. Point is, I'm not sure my intercutting dream sequence comes off well at all.
I considered cutting the scene drastically short and reinserting it after the Castle is locked down, but (a) you lose all that good Sir Cadogan footage by doing so, and (b) Scabbers is noted as being missing. This is way too early in the film for that plot point. The scene is better off being restored between Hagrid returning from Buckbeak's trial and Harry reading the Marauder's map in bed. It sets up why Harry was up so late studying the map, sets up why Peter Pettigrew is on the map, etc. etc. It's a good scene, but very incomplete without a proper setup to the scene.
Meanwhile, I could use the help of somebody great at voiceover work who is familiar with the movie. I want to get three words into the film as described in my first post in this thread. Somebody that can do the same voice that Oldman did. When he shouts "The map never lies!" I want to add "We made it!" immediately afterword. If anybody (especially you Brits) can record a believable version of this line to match the movie, I can mix it into the track with very little effort. These three words make all the difference between a great film and a perfect film.
edit: A clip of this cobbled edit is here. Feedback is appreciated