How would you make it so that flood have shields? Also when you kill a Flood Carrier how to make it pop out more infection forms?

For the flood having shields, go near the bottom of the flood combat actor variant tag, go to the "Unit" section, and change the "shield vitality" to 200, the same as the elites.

For more infection forms coming out, go in to the floodcarrier.biped tag, go to the camera tracks section, and under the spawn actor box, something should say "Spawned actor count" with two box's with numbers. Change the numbers to whatever you want.

That won't do it. You have to open the flood combat form's collision geometry in Guerilla, and under shield, set the shield vitality, set the shield material type, stun time, recharge time, shield depleted, and shield recharging effects. Basically, copy the things from the elite's collision geometry.

Can you explain the shield thing step by step please thanks...

Open up the flood combat form model collision geometry. Scroll to the part that deals with the shield and set the maximum shield vitalitly, the recharge rates, and the stun time.