Has anyone created a scenario based on XCOM or a Zombie Apocalypse?

[Galahir950]

Has anyone created a scenario based on XCOM/an alien invasion or a Zombie Apocalypse? How can you create/add a custom "people" for the aliens and zombies? Can the custom people/regimes have custom troop trees and troop graphics? What all would be required to make mods/scenarios out of these ideas? Which idea could be the most interesting and which one would be the best for a beginner?

Here is the spec sheet I created for the Scenarios.
XCOM Idea Overview
---2 player - AI Capable
---Humans use the Universal People and are called either XCOM or United Nations Alien Defense Force (UNADF)
---Aliens use a custom people and are called “The Incursion”
---Aliens have a reduced Troop Tree and all their units are more powerful, but are more expensive than the Human Units
------Infantry
---------Laser Rifleman (Rifleman)
---------Constructor Drone (Engineer)
---------Infiltrator (Scout/SMG)
---------Plasma Gunner (Machine Gunner)
---------Laser Hunter (Ranger)
---------Plasma Launcher (Bazooka)
------Armor
---------Hover Tank (Medium Tank)
---------Hover APC (Truck/Armored Car)
---------Plasma Shell Emplacement (Artillery)
---------Plasma Bolt Emplacement (AT Gun)
---------Laser Emplacement (Infantry Gun)
------Air
---------UFO Mothership (Transporter)
---------UFO Patrol (Fighter)
---------UFO Gunship (Dive Bomber)
---------UFO Corvette (Level Bomber)
------Navy
---------None
---The humans own all the world except Africa.
---The humans start with a resource advantage, but the Aliens start with a More Concentrated force.
---The humans start in Washington D.C./New York City.

Zombie Apocalypse Idea Overview
---2 player - AI Capable
---Humans use the Universal People and are called Survivors
---Zombies use a custom people and are called “The Infected”
---The Zombies only have 1 unit, which is weak, but very cheap.
------Infantry
---------Infected (Scout/SMG)
------Armor
---------None
------Air
---------None
------Navy
---------None
---The map is the same map used by 2nd Civil War
---The humans only own the Great Lakes region or East Coast, but it is heavily fortified.
---The humans have the standard troop tree.
---The humans start with a large resource stockpile and initial unit load, but do not own many raw resources.

EDIT 3/2/16: For the Zombies, how do I make a copy of the SMG unit? How do you add or remove people? I tried doing it under the ppl tab, but there are no buttons. I tried opening a copy of the rules file in Notepad++, but it is in an unreadable format.

EDIT 2 3/2/16:I figured it out, I needed to remove the masterfile.

[Galahir950]

The Zombie Scenario is ready for testing, would anyone be willing to help?

[begginfokillz]

im willing to help test