How to use the Face Weighted Normals toolbox

Download

Simply add this code to your Maya shelf and click to to open the tool window

Select the object you would like to align to automatically align the normals for & press this button

This method does not work well on curved surfaces, for that we use the next button 'align vertex normal to selected face'

Make sure normals are unlocked and softened

press 'use constraints' to easily select all flat islands of faces

select all the flat islands you would like to apply FW normals

finally, press the button 'align vertex normal to selected face'