Well, Bipeds occasionally grunt in pain (not spartans, but marines and covies,) but AI, such as marines, say things like "Covering Fire!" or "Engaging multiple contacts!" and many other taunts and dialogue, even when bump possessed.
So, my question is, is there any way to make Bipeds do this, and not just the grunts of pain?

In the .dialog tag I beileve you can scroll down and, you see stuff like beserk cowaring etc. and, just direct the stuff to the .sounds of the marines and, covenants.

Yes, and it does all that when it's an AI (or at least spawns as an AI, and is bump possessed by the player later,) but it doesn't do that stuff if it's a biped.
My question is, how would I make the biped do that?

i want to know that too.....

You could probably attach an ai to the player, but that might have unforseen consequences

But I'm not prepared for unforeseen consequences D:
DAMN YOU GMAN!

Well what I meant by that is the AI might try to melee or throw a grenade even though you're controlling it. To fix this, just go into the actor/actor_variant tag and make it so it doesn't melee, berserk, or throw grenades.

I don't care what the AI does. I just want to know if it's possible to make bipeds talk.

yes it is possible. You can do basically like CorruptedHalo's saying. For example you could use a marine instead of being the chief. Then change the marines actor/actor_variant tags so that the AI dosen't throw random nades melee, or go berserk. You could probally even use the marines animations to make it look like they are actually talking.

swordmaster, can u post a pic on what to do with the actor variant in guerilla?