Is there a way to force an update of the stage size?

Hi there!

Is there a way to force an update of the stage size eventhough it doesn't resize in reality?
I'm using these excellent align components that can be found here:http://chq.emehmedovic.com/
The problem is that the properties for the component doesn't get set right away - instead they appear only after the stage has been resized. Somehow I need force an update of the stage size eventhough it's not really is beeing resized...
I'm working 100% width and height...
Doeas anyone have any ideas?

Niklas