This paper describes the modifications to free, opensource driving simulator software to simulate a carfollowing task resembling that in the NHTSA driver distraction protocol. In brief, the peak-to-peak amplitudes of the lead vehicle were sharply reduced (to 70% of the specified values) and made more uniform. In addition, the mean speed was reduced by 10 ft/s to reduce the time to get up to speed (and collect data). Finally, modifications were made to the Logitech G27 interface commonly used with OpenDS. Wooden blocks were mounted on the foot pedals to make the configuration more car-like and the accelerator and brake pedal springs were replaced with stiffer springs (Hillman #49). With stiffer pedals, there were fewer instances of excessive speeding and braking g levels were closer to those in real driving, correcting problems that commonly occur with fixed base driving simulators.