Yep ballast resistor goes between coil power (black, white stripe) and pos side of coil. The trick is the power wire for the ign unit (red?) goes to the harness side of the resistor. I believe it says somewhere in the manual what size resistor you need, but the stock S30 one should work fine.
On another note, THANKS TWOEIGHTYTHREEZ FOR THAT INFO! That would explain my runaway motor problem. If I step into the throttle and the turbo spools up quickly, it sucks the pedal to the floor. I will have to re-adjust that...