Loading two swfs and playing them sequentially

Question

Hello Team,
           I have searched, but can't seem to find an answer to my question.  I'm working in Flash cs6 on Windows platform. I do not understand how to load two external swf files into another swf file(Main swf) and have them play sequentially. I certain that this task is extremely small to a lot of members of this forum, but if someone could be so kind to assist me with this inquiry I will be over-joyed.
I am able to load one swf with the following code:
var swf:MovieClip;
var loader:Loader = new Loader();
var defaultSWF:URLRequest = new URLRequest("swf/gallery.swf");
loader.load(defaultSWF);
addChild(loader);

Answer 1

AS3 - Dispatch Event
Example:
Add something to trigger the event in the child:
dispatchEvent(new Event("eventTriggered"));
(if dispatchEvent problem, see: http://www.kirupa.com/forum/showthread.php?p=1899603#post1899603)
The listener for this event has to be added to the main file AFTER the external file has been loaded.  In your loading/parent swf, listen for the complete event on the Loader.contentLoaderInfo. 
yourLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loaderCompleteHandler);
In the complete event handler, add a listener for the event on the loaded swf.
// event handler triggered when external swf is loaded
function loaderCompleteHandler(event:Event) {
    MovieClip(event.currentTarget.content).addEventListener("eventTriggered", eventHandler);
Then just create the event handler for the dispatched event listener that was created in the loaderCompleteHandler function.
function eventHandler(event:Event):void {
    trace("event dispatched in loaded swf");
    // load/play your second swf now