Could you explain your usecase a little bit more. You mapped the root path of your webapp to different pages. There is no way for PrettyFaces to know which one to forward to if an corresponding request comes in.
In this case your only option is to use dynaview. Just create one single dynaview mapping in your pretty-config.xml with a viewId pointing to an EL method. This method then has to decide somehow, which page should be rendered. You could perhaps save the “current view” in the session and simply return this from the dynaview method.