HALF DEAD mod for Half-Life

The main ideia about HALF DEAD is to bring to the half life engine the Zombie Trilogy made by Romero.Starting with the first "NIGHT OF THE LIVING DEAD", using Half-Life 1, making it as a RPG, First Person Shooter, Survival Horror genre.In Single Player you switch between 4 charathers, each one with is unique status ( stamina, fear, moral, aiming, health, etc ),
trying to survive the Night, stranded there by a Horde of undead ( they have status too, some are stronger, some run faster, the only thing they dont have is fear or moral ), using the classic weapons of the zombie killer kind, like the chainsaw, the ballball bat, the shotgun, ect,ect.The status of the player is important, as it reflects his behavior, like zombies coming near and high fear, aiming is weeker, or carring heavy objects you run slower.The goal is to make it as real as possible not excluding the others carathers interaction ( healing, trade weapons, etc ), because they are vital for your survival.As for the Zombies, they only die, by fire or shot in the brain, but beware, they can grab you, stopping you from shooting, take or gun, break and jump from windows, etc.And if you got bitten remember that you Always Die, is just a matter of time, when your vision will become blurring and your start vomiting blood.
In multiplayer is the same thing, except that each players controls him self and not all of the characters.
As the beginning of any mod, i need help, soo if you have any ideia throw it and we start the "BrainStorming".Thanks

SAM