If you want to cheat, use the following information! ;) Press "~" while playing the game, thus you will enable the console where you can enter any othe following codes to get the desired effect:
cheat points: get 100 points
cheat quest: unlock any level (1-31)
cheat money: get money
cheat all: get $500,000 and points
cheat drivers: you can hire all drivers
cheat trucks: unlock all trucks at the shop