AD has sketched out an interesting concept here. He's tried to imagine what you might get if you cross a Rapier I from the Wing Commander Movie and the Rapier II from Wing Commander 1. The two ships are not intended to be the same fighter in the continuity, but if they were, here's an idea of what fans might be dreaming about.
Notice that I've melded the front fins of the WC1 Rapier into the movie's short stubby and upturned wings. The larger gattling gun become two smaller gattling guns slung under the nose. The movie's engines and "rear" wings are essentially intact if not slightly upturned to mimic the fins on the WC1 Rapier. Also the main WC1 wings are mounted under here as well. The wingtips (turned down in the blueprints) are elongated somewhat for creative license since this is an moot excercise anyway.
The intention wasn't really to make a better Rapier for the movie. Again, as the Rapier is the only fighter in the movie that actually is a different space-frame altogether it's kind of a redundant excercise. But, the objective was kind of the same: Merge elements of the Movie Rapier with the WC1 Rapier II. I took the familiar elements from the WC1 Rapier blueprints and tried to mix them onto the movie ship frame.