Using this Trainer:

Launch the trainer first, then launch the Game and then Press F1 at the Main Menu.

Listen for "Activated".

Press desired option key

Options in Promo:

Numpad 4: Unlimited Ammo

Options:

Numpad 1: Unlimited Health

Numpad 2: Unlimited Stamina

Numpad 3: Unlimited Power

Numpad 4: Unlimited Ammo

Numpad 5: No Reload

Numpad 6: Mega Cash

Notes:

Numpad 1: Unlimited Health - toggle on and most things cannot kill you.

Numpad 2: Unlimited Stamina - toggle on and your stamina bar will not run out.

Numpad 3: Unlimited Power - toggle on and your power bar will not run out.

Numpad 4: Unlimited Ammo - toggle on and many weapon ammo will be large when you fire the weapon or when you reload.

Numpad 5: No Reload - toggle on and many weapons will not need to be reloaded when firing.

Numpad 6: Mega Cash - toggle on and look at your cash amount in the inventory.  If you cash is a negative value, toggle this back off and look again.  This gives you plenty of money.