This didn't seem to be work in my current save, but worked fine on a new game. How did you accomplish this? Did you just modify the story script to disable force the Origin characters to accept your invitation to join the party, regardless of how many are currently in it?
I also noticed the character assign menu has 4 slots, so assigning some of the characters might not work. One workaround I considered for testing and educational purposes was just copying the menu .swf file from DOSEE, since that one has a different design, featuring a scroll bar. I did something like that the other way around before and it did work. (copied the DOS2 early access character assign menu into DOSEE)
