Preload movie into level

Preload movie into level with percent, can this be done? I have tried several preloads from posts in the boards but none seem to work.

I have my main movie, and buttons that load the movies into the main movie by using LocalConnection(); I am using the following action script to load my movies, now I like to add a preload on the loadMovieNum(movie, 2); part.

listeningLC = new LocalConnection();
listeningLC.communication = function(movie) {
loadMovieNum(movie, 2);
};
listeningLC.connect(“object”);

A level won’t exist until it has content (after the movie has loaded) so you can’t use any of the methods and properties that you would with other movie clips. It would be better to load the movie into a movie clip.