Here's a few ideas i just thought of:

When Anakin is hanging on for his life in the elevator shaft, the droids say something like "He has the coffee" and "I knew it". When the droids are about to get crushed by the elevator, they say "COFFEE!!!"
When Anakin is crashing the ship, the dialogue between him and Obi-Wan should be as follows: "Now this is podracing" (Anakin - EPI), "come to your senses!" (Obi-Wan - EPII), "Don't make me kill you." (Anakin - EPIII), "Oh dear" (Obi-Wan - EPII)
When Padme is giving birth, add more sound to her. These can be found across the internet, on YouTube, and in plenty of movies.
Add he deleted scene of Yoda laning on Dagobah, but combine different Yoda dialogue to make him say "Oh shit."
Lower the pitch of Grievous's voice.
When Anakin is flying the flagship, add in the Jaive-speaking Soul brothers from Airplane, but with some new subtitles. Also add the scene where the girl says that they lost the engines, and the coffee is gone, and everybdy goes crazy.