Did you save the light saber effects on their own and then recompile with the underlying footage? I'd say you WILL have to remove the original glows but a lot of shots in ROTJ will make that very difficult.

I knid of need you to really explain things in detail to understand how you've done it and if there's a better way.

And I mean this in the nicest way possible but your effects come on too strong, you need to be a bit more subtle for them to be believable.

I would suggest finding some better / cleaner images to practice on and get a real feel for things to begin with.

A good idea might be adding sabers where there were none before [for practice]. Maybe try adding glows to regular swords?