Computer Controlled RC Car Hack
rccar.c is a C++ program that can be used to control a simple radio controlled car.
UPDATE: check out the webpage url for new photos of the project, and a correct wiring diagram. This project is portable to any style remote control device.
I used a $10 tiny matchbox sized RC car i got for christmas. The car is controlled through a printer cable. The software directly controls the voltage to 4 pins, providing forward, reverse, left, and right controls. Includes a simple wiring diagram.