During the game press Ctrl-Alt-X to bring up the cheat menu.
Type in the cheats at the cheat menu to activate that code.

Shields up                              Invinciblity
Gas does grow on trees                  Infinite gas
I'm the CEO of McDonnell Douglas        Now go to the catalog and press
                                        numbers 1 through 9 to get whatever
                                        helicopter you want
I love my helicopter                    Brings you to your helicopter
superpowermultiply                      Super speed when you hold down shift
                                        and move
Been there, done that                   Completes level in career game
The map, please                         Map