Activating this trainer:
If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:
NumPad2: Unlimited Boost

Trainer Options:
NumPad1: Unlimited Health
NumPad2: Unlimited Boost
NumPad3: Unlimited Ammo
NumPad4: No Reload
NumPad5: Always Ready Special Attack
NumPad6: Unlimited Money
NumPad7: Unlimited Rare Metal

Notes:

Unlimited Health:
Toggle on to keep full.

Unlimited Boost:
Toggle on to keep full.

Unlimited Ammo:
Toggle on to prevent from decreasing.

No Reload:
Toggle on to prevent from decreasing.

Always Ready Special Attack:
Toggle on to keep full.

Unlimited Money:
Toggle on and you have plenty.

Unlimited Rare Metal:
Toggle on and you have plenty.