Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
NumPad1: Infinite Health
NumPad2: Infinite Mana
NumPad3: Infinite Rage
NumPad4: Change Gold By 50
Unlock more trainer options including updates from here - My Mom is a Witch Trainer