Hi there,
Thanks a lot for all your input which is very much appreciated !!!

My code which I send worked via a (Tree / ViewStack) by selecting a Tree Node I choose my module within the ViewStack with handleChange(event) , and by this selection I used the modIntro_activateHandler(event) with the code etc, but this only worked in AIR yet in Flex I do need to use it as modIntro_ creationComplete Handler(event).
All this is not of much Importance as it is code which needs to be transformed to suite as you both very well showed and pointed out; I guess using it with the ViewStack handleChange(event) would be fine and maybe calling it in a separate function.
The main issue I think for me is that it would have to be addressed at each module change in the ViewStack reading out the right module Load/Unload with as few code lines as possible.

regards aktell