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: Invulnerable 
     NumPad2: Unlimited Health
     NumPad3: Super Damage
     NumPad4: No Bionic Arm Timeout
     NumPad5: Unlimited Ammo
     NumPad6: No Reload 
     NumPad7: Fly
     NumPad8: No Clip
     NumPad9: Hover Player Higher
     Multiply: Hover Player Lower
     Add: Increase Player Speed
     Subtract: Decrease Player Speed
     Decimal: Set Normal Player Speed
     Divide: Decrease Npc Speed
     F1: Increase Npc Speed
     F2: Freeze Npc 
     F3: Set Normal Npc Speed

# Teleport 
     F4: Save Position Slot 1
     F5: Save Position Slot 2
     F6: Save Position Slot 3
     F7: Save Position Slot 4
     F8: Save Position Slot 5
     F9: Restore Position Slot 1
     F10: Restore Position Slot 2
     F11: Restore Position Slot 3
     F12: Restore Position Slot 4
     F13: Restore Position Slot 5

# Game  
     F14: Game Speed

Notes

No Clip:
Wouldn't work without 'Fly'.