Hey Reality (or anyone)

Planning to do play XCOM 2 and have Playable Aliens/Unkown installed, but I need a few things sorted before I do, if anyone can help me list/do this, let me know below.


1. Stop other then "Vipers" showing up: So, I only plan to use the Vipers (Unless spectres are released already ). How do I stop other aliens from being in-game.

2. Due to I will be removeing the other aliens, how do I stop the Vipers from only being useable unless I already "Met" the Vipers, when they start showing up?.


3. Viper's Skills & Weapon Change: So, I plan to change the Viper's skills to be a mix-match of Repaer/Sharpshooter, with either a Dark Lance or Plasma Sniper Rifle (Damage will fit each teir).