How to load a module dynamic? Pluggable module

I want to build up an application with a pluggable function. This
application is base on gwt 2.0.3 and jboss seam 2.1.2.

This is what I want the application load the plug.

- Serverside have a monitor checking a plugins-upload folder
- When It find a validate plugin in plugins-upload folder
- Generate a plug-in javascript
- When reload the client side app, it will check the plug_in.js
- Load the plug_in.js's plug-in list into a plug-in manager page
- in plug-in manager switch on the plug-in
- load the plug-in(a gwt module), get ready to listen the event

a plug-in is another gwt module

But it seems gwt cannot load any unknown module on the runtime.
Any body have this experience or any idea how to implement it?

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