Ender 3 Pro, Sprite Extruder, Creality 4.2.7 mainboard, Marlin, CR Touch

As the title says, I have the above hardware, but just installed the CR Touch. I’m having some serious difficulty finding the right combination of firmware to get the CR touch to work… It doesn’t auto home, fails after touching same (first) spot twice, and gives 112 error. install instructions do not have the right steps, as in the options listed aren’t there. Does anyone know where I can find the right firmware, or even a method to combine all of it piecemeal?