Step 4: SET UP EQUIPMENT
Placing the projector on the roof avoids getting a lot of shadows from pedestrians and automobile traffic. If a slightly more clandestine setup is what you are after place the projector on a box inside the car so it points out the window. Run the VGA and power cable from the projector in through the window.
Place the inverter on the dashboard on the same side as the car battery. Snake the cables through the crack between the door and the car (not through the window). This will avoid ripping it off the dashboard when you inevitably forget about it and swing the door open. If its your car and you are hardcore, get a drill and make a hole under your dashboard to run your cables directly to the car battery
Secondary Inverter (optional):
Plug this into your cigarette lighter.