Buy the unit and wire it into the ecu harness. I did one on a honda this past summer. I don't suggest it for your car though, b/c from what I understand, it requires constant tuning b/c the ECU sometimes finds ways around the dummy signals that it puts out.
I'm not even going to run one on the 6g when I turbo the 5s... I'm going straight to emanage ultimate.
If I were you, I would just get the car off the jackstands first and see how much you like it when it runs right.
~Chris