Using a complete OpenSolaris Desktop-Session inside a running Desktop-Session with a different User

In the menu of OpenSolaris is an entry named "In einem Fenster neu anmelden" ( english "New Login in a Window" ) "Systemwerkzeuge" in German ( System Tools in english).

I have an additional local user. After starting you get a login screen, like in the "real" session.

After the login, a complete desktop is visible: