How to create "read only" responsibilities

 Hello,

My client wants to create all the super user responsibilities to read only. That means all the menus in these responsibilities should have all the functions under Menus and submenus to be "read only" or query only.

I have learnt following ways :

1. Make the respective functions : View only = yes in sysadmin :: This will take a huge time.

2. Change the profile option HR:Query Only Mode to :yes" :: It works only for HR responsibilities hence not usefule for other responsibilities like Purchasing super user or Order management super user.

3. extend the custom.pll to make the responsibilities view only :: Not  recommended as it is bit risky .