Time to answer some things here:

@Muffindo: Well, the script would have to render the replay and save the joint movements and his corresponding frames of the replay in a file apart. Then the lua file would have to render every frame of the replay while you are editing it to check if the other guy is moving. If he is, then the script would change the corresponding joints of that guy and you would be able to edit your character to the end.
This way you would have to edit the whole replay to the end. Collisions would fuck up the other guy. After editing, you need to press p and wait untill the end of the replay, otherwise the other guy would be fucked up.
I could do this, but im still a newbie in lua, even though i can do some neat scripts.
I used the word "render" as an expression, im not sure if it is the correct word.

@Emogotsa1 and OrientGuy: Tried it, didnt work. Maybe a pro scripter could do it.

@KlLeR: There are already a few of scripts that move uke, 2 examples are the opener script and gmon's Judo Trainer. (Will work in classic too)
Anyway none of them is pro, because its very hard to give uke an A.I.
Anyway i recommend you to use gmon's judo trainer.

@Assassin99: gmon's Judo Trainer will work for you.

@Davstanley: If you mean a script that will show you how to use those moves, then good luck.
I would try to make one, but i recommend you to practice. If you learn how to make that move alone, you will be able to use it everywhere.

@TehCaek: What you mean by Aerial camera and Anderground camera?
If it is a camera that will look at you from up and down, i can try to make it.

I think its all.