GUIRENAME  OldGuiName NewGuiName

 This renames a GUI.
 It is useful in many instances, for example if you want to load
 many copies of a certain GUI, or reloading a GUI in the middle
 of a command sequence, like so :

 GuiRename MyGui MyGui2      ; Reload a GUI
 GuiLoad   MyGui
 GuiQuit   MyGui2

 Be careful though..
 A renamed GUI has no file, so you can't edit it, or save the 
 resize BIG|SMALL commands into it.

 Example :  Run Gui   Source