This function returns the percent of the movie that has so far loaded into your
trmporary file folder, its possible values are from 0 to 100. It always returs an
integer value (means there will be no vlaue with point as 21.4 or 34.5, it will
always return a round vlaue as 21 or 34. So its really handy function because this
way we can let our movie goto any Frame number.
I assume that you already know how to make a simple preloader for your movies. You
will have to make two scences, in the first scene (will be will at the top) you will
place your percenatge preloader and in the next scene (Scene 2) you will place your
movie to be loaded(main movie)