ActionScript 3.0 :: Project Advice Related To Interactive Chart?

I am having a hard time concepting how to structure the current project I have been tasked with. I wanted to make this dynamic, as its for a school that will add or change course sequences. I was thinking of having several movie clips, with one movie clip class that loads in xml information, but then the problem is how can i keep track of the other movie clips and animate precisely one course to another while being interactive?

I know that I could simply draw everything up in a movieclip within flash, but I thought there could be a way to go through an xml file, look at how many <class></class> tags their were, create movieclips based on how many of those are present and pass the xml information within the class to display to the user. I need to use a tree structure, with the user being able to click to each node along the tree and recall the information, when they click I need something visually interesting to happen between the 2 nodes.

So in my mind I am thinking
1.) document class,
2.) reusable movieclip class (card template, with text objects)
3.) a class that takes the xml and passes it to the movieclip??
Its one thing to want interactivity and draw everything, but to make it dynamic to be easily updatable. Is there a way to put a tween in a class to reuse and precisely where to play?