Payday 3

An instance for Payday 3 can be immediatly be created in MO2 simply by selecting Payday 3.

Afterwards your first step should be downloading a UE4SS pak file unlocker.

It can be installed using MO2

Once activated the UE4SS Tab will populate, it allows toggling UE4SS specific mods directly.

Additionally once several PAK format mods have been installed their order can be changed in the PAK Tab.