First: sorry i can't write english so good....
How can i move pictures with green background (green screen) like i want.
like this movie: http://www.youtube.com/watch?v=-ZM4Hkw5CPk

how can i move things different in every frame like the lightsaberfight?

Hmm.. AFAIK lightsaber-making will do by rotoscoping not with greenscreen.

I onlyheart of it, because a friend of mine had something like that doing.