eclipse launch configuration dialog access tree
===

I'm trying to develop eclipse plugin, which adds a new type of launch configuration. It should be composite launcher, which can agregate several types of existed launch configurations. Result - plugin should provide opportunity to launch many applications in one.
I added my new type of configuration into tree in Launch Configuration Dialog. And I'm wondering if it is possible to add subtree into each launch configurations of my composite type? 
I want to have something like this:

    Composite Launcher
        New Composite Launcher
            JavaApplication1
            JavaApplication2