What I understand about CUI is to have two seperate profiles. One profile is for a CAD manager profile. This profile would have the enterprise CUI file as the main CUI and not have an enterprise CUI set for that profile. Then a second profile would be a USER profile. This profile is for the everyday user that needs no customization of the enterprise CUI. This profile would also have the enterprise CUI (which is read only) set as the Enterprise Menu, and a custom CUI set to the Main Menu.
You may want to look at some
Notes on the philosophy of CUI.
HTH