How much of the old footage is actual 'deleted scenes'?
I just watched this movie, and I have to say, a lot of the recycled footage, I think, was stuff that was actually used in the earlier films. For instance, when Marie Jouvier is talking to Cato, the fight scene shown is exactly the same one that's in The Pink Panther Strikes Again, and then they show the footage of Mr Chong getting attacked by Clouseau from Revenge Of The Pink Panther.
The footage shown from the first Pink Panther movie also appears to be straight out of that picture, and I think the same goes for the footage from A Shot In The Dark.
I'm not sure, but I think the only truly "new" footage that hadn't been used in any of the other movies is the scene in the car with Clouseau fiddling with the cigarette lighter, the scene on the airplane, and the opening bit at Professor Balls' costume shop.