Loading external movieclip after the first

How can I load an external movieclip into the stage after the first movieclip has finished loading on the stage?

I want to do during startup to play this movieclip and once the movieclip has finished playing, immediately the 2nd external swf loads in and play on the stage.

I did not want to do all on a SWF itself as it consumed too much disk space as it is supposed to go onto the web.

Any help and codes will be deeply appreciated!