Need help for developing a Unity FPS Game again (1)

Hello guys,
Im still working on a multiplayer/online first-person-shooter game with Unity.
Im doing everything on my own, because im the ONLY 1 DEVELOPER.
Some features for now in it are:
- Gamemode Team Deathmatch
- Different guns for each team
- Able to enter a key code for a special offer or weapon

Im creating my game with help from this kit:
http://forum.unity3d.com/threads/153337-FPS-Kit-Version-2-0

Now but the problem is:
I wanted to make a zombie mode to.
But i dont know how to make a script for the AI Damage.
For now we take a cube as example.
Ive created a script already for the cube so he can follow a player.
The problem > I dont know how to make the cube "destructable".
I want a script for the cube like this:
- Able to assign a gameobject (transform maybe) when the cube is being hit by that assigned object

Please help, if you know how to.
Im stucked

 

http://forum.unity3d.com/threads/169773-RELEASE-Zombie-Survivor-Game-Template
http://smartroadie.com/index.php?route=product/product&product_id=287

 

Ive got already my own animated zombie model, but anyway thanks.

 

Hey, I have been spying on piracy forums to inform developers about pirates. TBOY298 is a pirate and he stole this asset, I saw him begging for it.

 

I will refuse to help pirates. Prove you have bought these assets.

 

All from a certain forum yes? Why not buy and support developers.