hmmmm... I'll see if he has an entry.... Kinda stinks about the externals. It's to Fix up Tifa. I just noticed that her hair bones anr't Physic'ed anymore and would want to avoid hand animating it... also I've had to port Tifa over Diddy and kinda missing that entry and the feathers from the jump XD
If it's over Diddy, then it's very possible with the lights. Diddy has a barrel in his entry, so you can definitely replace that (I've done it before, myself). As for the physics, I think hair, capes, and the like only work in their original place. I don't see why they would continue working when ported....
I'm no expert, but I guess an answer is better than nothing, right?
If Pit's graphics are in his FitEntry.pac, I suppose you could get them and replace one of ZSS's graphics. That counts for the lights, at least. As for the feathers, I believe that those are an external graphic effect and are called in PSA (Like the darkness in Ganondorf's entry.) As far as I know, you can't move external graphic effects. You could probably attempt to Port ZSS over Pit (Or wait until BJ finishes THEN import over Pit), but I don't know how well that would go down.