[flexcoders] pass parameter to a component instantiated via popupmanager

[Mauricio Zuniga]

I have an upload file component which I instantiate through popup manager 
with this code:

  public function uploadFiles():void {
 // PopUpManager
  var upWindow:IFlexDisplayObject =
                    PopUpManager.createPopUp(this, panel_multfileupload, 
false);
       upWindow.move(100,140);

  }

this works fine, but I would like to pass in two parameters to this 
component, namely - userid and folder to save the files in.  As a regular 
component, I am able to do this. but with the PopUpManager, I cannot seem to 
figure it out.  I am thinking of creating a php session class for use with 
weborb, but I gather there is probably an easier way.  Is there a way I can 
reference the component panel_multfileupload? Is there an easier way? 
Thanks!
Mauricio