ActionScript 3.0 :: Input During A Holding Loop?

I have separated the background info on the "WHY", from the "WHAT" so that people can give me feedback on my question directly, but if they require more information, they can read my background info to understand the purpose of what I am doing.
  
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Background Info (the WHY):
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I am working with an actionscript structure as follows:On a specific frame exists a controlling function or "node".  It contains a user defined array of "branches" or sub functions.  These sub functions(branches) are of a user-defined class which can hold other code.  Other programmers will be using this structure.  When they work with it, they will be dynamiclly  adding new  "Branches" which the node will then run in whatever way they specify.  I am coding the node, and creating the different execution options that the other programmers will be able to use.
 
One of these types of executions is for the node to LOOP through the branches (however many there may be) waiting for either a key press or a mouse click.  On either input it should exit the node and continue on to the rest of the frame, and then the rest of the program.

My original structure is based on user defined Event Listeners and Dispatchers. Upon Entering the node I begin by defining:
 
addEventListener("BranchComplete",nextBranch);  addEventListener("RepeatDone",runComplete);
 
runComplete executes when the node has finished, nextBranch is fired after each branch has successfully finished.
 
I originally fired off:

dispatchEvent(new Event("BranchComplete"));  

as the last line of the Branch executing function.  The problem with this was, the function "nextBranch" does not return until all that it has called/triggered has finished.  "nextBranch" ends up being called recursively by the EventListener.  This causes a stack overflow.
 
I then changed the code, by moving the 'dispatchEvent' command into the same function that added the EventListeners.  This ensures the function "nextBranch" has finished and returned before the EventListener triggers it again.  This prevents the recursion and the stack overflow, but creates a new problem:  The 'DispatchEvent' only occurs once, as after the second time through the branch, it returns and continues on the line after the dispatch.
 
In order to get around this, i placed the dispatchEvent inside a do...While loop, that tracks a variable that is only set to false when the user gives Mouse or Keyboard input.  Voila, problem solved, code loops forever while calling "nextBranch" and triggering "BranchComplete" events as they complete.  The only problem is, user input doesnt seem to be caught, due to the infinitely repeating while loop.
 
To test that it does in fact work correctly, i set the While Condition to automatically turn false after 1000 iterations.  This works perfectly, and exits after 1000 branches have executed, all triggered by the Dispatched events.  So, I want it to loop through my Branches until Key press or Mouse click. It appears that during a while loop, Keyboard and Mouse Listeners will not trigger.  Is this true, and what is the best solution for holding in a loop while waiting for an event listener to trigger?