how to use own mui.exe ?

this question came up the last weeks and is now urgent.

although i search i didnt found any hint for me how to bind my own MUI exe-file.

it is boring to alter the system-nsh files...

thx

um, i think i got it - after zillions of tries 😁

!include "MUI.nsh"
!define MUI_UI "mui.exe"

ok - and it doesnt have to be laid in the UI folder.
that was my major question cause all tries went somehow wrong...