Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:
NumPad.: Super Speed

Trainer Options:
NumPad1: Infinite Health
NumPad2: Infinite Oxygen
NumPad3: Infinite Blood
NumPad4: Infinite Stamina
NumPad5: No Fatigue
NumPad6: No Wetness
NumPad7: Perfect Body Temperature
NumPad8: Unlimited Calories
NumPad9: Unlimited Water
NumPad0: Unlimited Muscle
NumPad/: Perfect Body Fat
NumPad*: Perfect Digestion
NumPad-: Perfect Excretion
NumPad+: Toggle Creative Mode
NumPad.: Super Speed

Creative Mode:
While active you can access all the creative features in normal mode via hotkeys such as:
SHIFT+F8:  Toggle god mode
SHIFT+F9:  Toggle fly mode
SHIFT+F10: Toggle item spawner
SHIFT+F11: Toggle time control

Notes:

Toggle Creative Mode: Press hotkey to toggle between normal and creative mode.