Topic: Generate Mouse Click Event on thumbnail

This question may be due to my unfamiliarity with as3 but here it goes.... My client likes the tiltviewer but wants the viewer to be already "clicked" by default. I can simply dispatch a mouse event with a the following code:

movieclipname.dispatchEvent(new MouseEvent(MouseEvent.CLICK));

However, I cannot for the life of me figure out how to drill down to click on the first thumbnail. I've tried everything! I simply have an empty movieclip called "tv" and I'm using the tiltviewer example embed code to bring it into my main swf like so:

var tiltviewerloader:Loader = new Loader();
var tiltviewerurl:String = "TiltViewer.swf";
var tiltviewerurlReq:URLRequest = new URLRequest(tiltviewerurl);

I attached the following event:

But when I inspect it, I cannot access/find any of the children that pertain to the tiltviewer.swf. How can I do this??? This seems like a real there any documentation on the swf instance names, etc...???