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.

Trainer Options

# Player 
     NumPad1: Unlimited Lives
     NumPad2: Unlimited Grenades
     NumPad3: Unlimited Jumps
     NumPad4: Invincinble

Mute 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.
You can also mute specific hotkeys by changing the hotkey you want to mute to 'NONE'.