James,
When you are at the track, lower the pressure in your rear tires a little bit (not a lot) and if you have adjustable shocks, like Konis, set the rear shocks at the softest/lowest setting. If you have a front sway bar, disconnect it completely.
That done, just experiment with launching at different rpm until you find the right amount of wheel spin. Pay very close attention to the 60 ft. times on your slips -- past that, its mostly just a matter of flooring it and hitting your shifts right. With a street NSX, the best 60 ft. times are going to give you the best 1/4 mile times. With the torque you get from NOS, you should get well into the 12s.
[This message has been edited by David (edited 16 July 2000).]