That can be done but more then 30 scripts have to be changed and inside many events / behavior / story scripts will surely make game unstable at one point if you miss one. As I tried earlier to see.
At 6 players crime system & party follow systems & many dialogs & in some area combat & some of script related skills will not work. Can be repaired but i don't think it will worth the time.
You can make a half new game with that kind of stuff and its not a work for only one modder
