Yeah, Tiaexz, I was putting together a response as to why even the 2+2 method wouldn't work and I then I figured out that you can trigger character creation GUI again by adding characters that haven't been through it before and then saving.

Right now the two new players use player scripts and not henchmen scripts which means they can initiate dialog and trade, but the game obviously wasn't designed for 4 players so I don't know how stable that be.

Putting the all the logic in startup script allows you to mod the main game without touching any of the scripts. I'm not sure what exactly triggers the 'this mod is corrupt and can't be played online' warning, but I wanted to avoid that.