ActionScript 3.0 :: Enable Outside File When Loaded Via Main SWF?

If I have a main.swf which loads, for example, outside.swf, is there a way to make outside.swf useless if run on its own, but working when loaded via main.swf? The purpose would be preventing people from running parts of a presentation on a CD, forcing them to use only the main.exe projector file. I tried making a Boolean variable called "allowed" in outside.swf telling the movie not to play if it's set to false, and then tried changing this property from main.swf after loading it by calling loader.content, but it didn't work.

I did this:
ActionScript Code:
button1.addEventListener(MouseEvent.CLICK, loadaj);
function loadaj(e:MouseEvent):void {
var MVloader:Loader = new Loader();
var req:URLRequest = new URLRequest("outside.swf");
MVloader.load(req);
attacher.addChild(MVloader);
MVloader.content.allowed = true;
}