Call MC to stage (random)

Hi,
I think this is quite a basic code, but for some reason I can’t figure out how to do it ^^.

I’ve got an MC that walks a path, this path is tweened, not scripted. Now this MC is in my library, I want this MC to spawn on the stage(random) and unload it once it is finished. If possible, I want to have multiple of this single MC on stage at the same time. And finally I want all of them to spawn at the same coordinates.

Does anyone know how I should do this in AS3?
Thnx,
Pafke