I am making an fps and I want to make allies... Help me

Hi I am Making a FPS and i was wondering if any one could tell me how to make allies. Like how in cod6 you have cpt. Price.

if anyone could tell me it would be great

also I'm trying to make it free of cost

If you change the FPS tutorial AI scripts so that the waypoints are near you (and move when you move.), and the targets are the enemys it would work well.