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

Trainer Options:
NumPad1: Unlimited Money
NumPad2: Infinite Mission Time
NumPad3: Super Speed
NumPad4: Change EXP By 5000
NumPad5: EXP Multiplier

Editor Options:
Misc: Money
Misc: EXP
Modifier: EXP Multiplier

Notes:

Money / XP (Editor): Visit your garage and purchase something first. Values will not immediately change ingame.

Unlimited Money: While active visit your garage and purchase something to get unlimited money.

EXP Multiplier: While active your gained EXP is multiplied by 4 (default). Change the multiplier using the editor.