Need help finding an addon

Alrighty, one of my friends has a couple of NPC’s that he’d like to be allies, but can’t find an addon to make them friendly. Personally, I don’t know if it can be done, because they’re custom NPC’s…but anyways, is thee anyone that can find such an addon to make NPCs alies? He doesn’t like NPC control. NPC.

Friendly Combine.

Your friend can script them to be allies, just check out the civillian HL2 code.

Because everyone is a C++ expert.

He said that his friend has some custom NPCs, so can’t he just edit his code?