When in debug mode, more keys are enabled during the game, these are listed below:

K Zoom out

L Zoom in

NUMPAD 8 Pan Up

NUMPAD 2 Pan Down

NUMPAD 4 Pan LeftCAR PRICE

NUMPAD 6 Pan Right

HOME Centre The View

NUMPAD + Advance Frame by Frame

ALT Quick Frame Advance

R Refresh the screen

D Take screen shot

NUMPAD * All weapons + All ammo

C Shows Speed and Damage etc.

F12 Restart current level

TAB change car color

Also you got the driveby cheat