DGNLIB AND UCF, PCF AND CFG FILES

Question

I have the following code in my CFG file. 
 I want to disallow the Menu > Workspace > Preferences for all users 
 What do I need to do here? 
 
 I still need everyone to see what they see now I just don't want that option available. 
 ##***************************************************************** # # DGN LIBRARIES AND GUI LIST # #***************************************************************** #_USTN_SYSTEM_DGNLIBLIST = j:/client/client_standards/client_substation_user/dgnlib/varo-substation.dgnlib #REMOVED FOR TEST BLM 07/06/2015 #_USTN_SYSTEM_DGNLIBLIST = j:/client/client_standards/client_substation_user/dgnlib/clientustation.dgnlib _USTN_SYSTEM_DGNLIBLIST = j:/client/client_standards/client_substation_user/dgnlib/ustation.dgnlib 
 #MS_GUIDGNLIBLIST = j:/client/client_standards/client_substation_user/dgnlib/varo-substation.dgnlib #REMOVED FOR TEST BLM 07/09/2015 #MS_GUIDGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/clientustation.dgnlib #REMOVED FOR TEST BLM 07/09/2015 
 MS_DGNLIBLIST = j:/client/client_standards/client_substation_user/dgnlib/clientustation.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/varo-substation.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/gui.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/USTATION.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/standards.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/pagelayout.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/modeltransparency.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/luxologyrender.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/linksetseed.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/levelstandards.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/ifcicons.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/icons.dgnlib 
 MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/epfsplotstyles.dgnlib MS_DGNLIBLIST > j:/client/client_standards/client_substation_user/dgnlib/clashdetection.dgnlib