Preloader for an external swf

Hey im new to flash and i was wondering if some one could help me with a problem im having.

I have managed to get an external swf to load with this code :-

but_1.onRelease=function(){
_root.container_mc.loadMovie(“123.swf”);
trace(“hello”);
}

But I want to be able to have a Preloader onit with a status bar etc. Can someone help me pls? :slight_smile:

thanks