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 2: Unlimited Ammo

Options:

Numpad 1: Unlimited Health

Numpad 2: Unlimited Ammo

Numpad 3: No Reload

Numpad 4: Quick Kills

Notes:

If game occasionally crashes at cutscenes, toggle the options off before the cutscene, expecially the ammo and no reload options.

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

Numpad 2: Unlimited Ammo - toggle on and many weapons have unlimited ammo.

Numpad 3: No Reload - toggle on and many weapons can fire with no reload.

Numpad 4: Quick Kills - toggle on and many enemies are killed quickly.

Temporarily Disable Hotkeys:

To temporarily disable the Hotkeys, press CTRL-H after trainer is activated.  You can use CTRL-H to re-activate the Hotkeys as well.

Creating Custom Hotkeys:

You can click on the actual option in the Trainer application itself to modify the Hotkey or the value used for that option.  The trainer will save your hotkeys for you.  To delete your Custom Hotkeys for this trainer, press the Debug Tab and then press CTRL-K and the keys will be deleted.