Friendly Combine NPC's WITH COMBINE SOUNDS

Hey all. I am going to make a machinima thats basically a documentary on the life of a combine elite. He of course will be in a squad of other combine elites who will unfortunately meet their demise along the main protagonist path. If someone could tell me how to make friendly Combine NPC’s that will not just follow the player but also make combine sounds, I will give you due credit and would be extremely appreciative.

Thank you,
TheLastWhiteKid

Try the faction mod. It allows you to change the faction of an enemy NPC to that of the player.