On the equipment screen select the white bug ship and put it on the grid area. Then choose the orange laser and drag it to the face of the shop keeper. Keep clicking the LEFT MOUSE BUTTON until you get $500,000.
Insert the disk, and hold both mousebuttons until the title screen appears. When youre in the shop hold down 'HELP' and 'DEL' for a few seconds, now choose your ships as normal, but you have infinite energy.
To get more cash at the beginning of the game, select the smallest ship (the one at the top), then the weediest laser (the orange one with single beam), and place it on the shopkeepers nose. Hit the fire button to get the cash boost!