Press Keypad 7 during gameplay to show the console window - Put in "im a cheater" to start cheat mode: Now try one of the codes below.

All Ships - Ragtag
God Mode - quickening
5000 more credits - one million dollars

To be able to pick up full speed with the afterburners you need to hold down the Q button.

The ship will keep it's direction and speed until the button is released, If done correctly this will be done without using any afterburner energy.