I replaced the old CG fire and CG smoke with composited fire and smoke. Here are before-and-after comparisons of Scene H328, which is after the Stormtroopers have massacred the Carinda family (represented by the CG Stormtrooper stand-ins lying on the ground on the bottom-left):
And here's a close-up comparison (Scene H329):
You can't really tell in these pictures, but I also added a flickering light to the doors and windows that are "on fire." This helps blend the 2 different layers and makes them look like the flames from the composited fire are illuminating the CG model.