Change Level Settings
Under the beachhead directory you'll see a list of all the levels in the game:
Level_00
Level_01
Level_02
etc
to
Level_60
If you open those in notepad you can modify any of the levels settings. Incuding
type of ammo and the enemys agression...
//Bullets, Projectiles, Missiles
Ammo 250 15 15
Time 120
//Tank, Jet, HelicopterGun, HelicopterRocket (range:1-9)
Aggression 6 6 6 6
Just change the numbers beside "Ammo" to whatever you want, or lower the
agression of the enemies to give yourself a little breathing space.