if you're talking about my script, then yes it will work and you must use the Auto-L5 modes for 4:3 content because all the Manual-L5 modes were implemented for 16:9 content ( personal choice: since 4:3 UHD content is rare).
If you need to do more RPU editing, there's an RPU editor mode that allows you to do pretty much anything. (MODE.R ---> MODE.7= RPU Editor)