Kivan and Tazok encounter?

In v2.5.17.0 Kivan and Tazok chat before battling while the rest of the bandits on-screen stay neutral and watch. How would I script this to have allow the enemies in the bandit camp become hostile instead of just Tazok? IF InParty("kivan") See("kivan") THEN RESPONSE #100 SetGlobal("JoinedBandits","GLOBAL",0) ChangeEnemyAlly("tazok",ENEMY) Attack([PC]) END