Arrays :: Sorting Order Of Series Of Flash Slides Into Dynamic Presentation

I'm not quite sure how to do this - I'm building an admin interface to sort the order of a series of flash slides into a dynamic presentation. The admin interface pulls the slides from xml and displays each as a thumbnail. The thumbnails, when dragged, reorder themselves in the array appropriately. The problem is, I want the actual array of slides to reorganize itself accordingly. My code is this:

function onThumbPress( e:MouseEvent ):void {
e.target.startDrag();
} function onThumbRelease( e:MouseEvent ):void {
e.currentTarget.stopDrag();
sortSlides();
[Code] .....

So what I want to do is take the change in the array (say 0 moves in front of 1 in project_thumbs_array) - and make sure that my other array (project_clips_array) moves item 0 in front of 1 as well. I thought something like this might work but it doesn't:
project_clips_array.sortOn ('project_thumbs_array.x',Array.NUMERIC);