hi there flash harry potters!

i have a 500x500 base, and i have made 4 different movies
that i want to load in the middle of my main movie when a its respective button is pressed.
i cant figure out how to get it to load right in the middle

i was told that by doing a movie like this it loads quicker.
anyways, thank a lot before hand, i am sure this is a piece of cake

chao