Cheat Mode:
Pause the game and type one of the following codes.

Code                                 Effect  
hardtruckisthebest or wininalottery  Money and license   
openallroads                         Unlock all roads   
advancedmap                          Display hidden containers on map   
freerepair                           Press Backspace for free repair  
freerecover                          Press Ctrl + 5 for free recovery   
fillup                               Unlimited gas   

Turbine:
Pause the game and type turbine.  To use turbines press:
Ctrl + 1 for forwards
Ctrl + 2 for reverse
Ctrl + 3 for up
Ctrl + 4 for down