This is an example of Jason Hawryluk's Spring loaded tree but re done to use the datadescriptor rather than xml for finding branches...
it's a great component... you can drag and hover over the node you want, and it opens right up... http://axel.cfwebtools.com/index.cfm/2007/9/7/Using-a-tree-with-drag-and-drop-FROM-a-grid
