Oh, I don't really have any skill level whatsoever in fan editing as of right now. Although, I'd like to learn some basics whenever I get some more free time to devote to it. So, I can't even imagine how difficult it probably is to change films, cut scenes, add scenes, and re-sync up music and dialogue and everything. Crazy...

Anyway, all that being said, I think the the changes I was thinking of for The Prestige could be accomplished by removing scenes form the movie, and then simply extrapolating a different outcome based on what you see/don't see.

For example, let's say you only see one water tank with a body in it at the end of the movie rather than a whole bunch of them. One could reach the conclusion the Angier only made 1 clone (animate or inanimate) or that it is Root. (I'm not saying that would work from a plot or technical standpoint, I'm just trying to come up with a quick example).

As of right now, this is mostly an academic exercise anyway, just to find out what changes, if any, people would like to see. Then the next step would be figuring out how to accomplish those changes, but that might some time off, or for a talented fan-editor to take up.