RigidbodyFirstPersonController + Gui???

Hello,
I notice how the RigidbodyFirstPersonController script hides the mouse, but what if I also want to use GUI in my game? How can I interact with my GUI controls WHILE using a first person controller? Also, once I press ESC (to get my mouse to un-hide itself so I CAN click on a GUI control to interact with it), when I click on the GUI control, the mouse re-hides itself and I can't exit OUT of the GUI control to stop my program during runtime. What could be done to fix these common problems?

Thank you,
Michael S. Lowe