Few questions

Which takes more space:
AS movement?
Tween movement?

When there are frames that are not used, do they take up memory?
i.e. Frame 1 has 50 frames, create a new Layer, it comes comes out with 50 frames, but you only use 30 of them. Does the other 20 take space?

On preloaders, is the preloader and the main movie/game/whatever on the same .fla? If not, how do I indicate what I’m loading?

Forgot the rest… need sleep z_z