google re-released the instantiations products into the wild. Specially the GWT designer is very powerful and is valuable. It would be nice if the proj we create just could benefit of those 'new' plugins.
We do that by adding the instantiations builder and instantiations gwt-nature:

http://download.instantiations.com/D2WBDoc/continuous/latest/docs/html/wizards/gwt/project.html#ExistingProjects