How to add skills or talents for units?

[bucazaurus]

A unit can have maximum 3 special abilities . Adding more then 3 is not possible from what i know .But you can still replace the existing ones with abilities from other units.
In the picture attached you can see a bowman using a demon's special abilities.
To change this you need to edit the unit's atom file in Data/data.kfs.
Extract the unit's file with winrar , place the file in Data/mods folder and edit him with wordpad. Practically it's a copy/paste operation from other files.