So with blender’s PIE’s menus, switching screen layouts is really great.
Problem is, PIE’s are filled with options on the fly in alphabetical order, which means you can’t really organize your PIE the way you’d like. So I wrote a little addon that will do just that – simply fill in your Screen Layout names in addon configuration to the corresponding NumPad values, save preferences and never worry again!
Help section will contain information on how to setup hotkey for the PIE.
This is where you get the addon: link.