Extract to mod_overrides

ASSAULT: Fullmetal Frontline | https://www.youtube.com/watch?v=n2x1Fhafw-A
ANTICIPATION: Black Eagles | https://www.youtube.com/watch?v=0HzDG9ykCjA
CONTROL: NotL:Op (Briefing 2) | https://www.youtube.com/watch?v=3J8YLAD35kA
STEALTH: Operational Parameters | https://www.youtube.com/watch?v=-RraRZVHIG0
(Track is normally 52 seconds, but it's looped to be 2:29 in-game.)