How to disable top-speed limiter?

Al_

I took my new car on the track and kept getting left 'stood still' when I hit 155mph.

Does anybody know the magic incantation (button/key sequence) to disable the above. I'm assuming it must be possible, or it's a bit of an oversight on such as wonderful car.
Sick to death of watching the back end of a 911..!
(I have mega-speed rated racing-spec. tyres on order).

Better still, is there a full list anywhere of known parameters the user can tweak stuff with?

I have the one that seems to re-arm the SRS after routine maintenance (fitting of parking sensors) to start the thread off:

- Sit in drivers seat with key.
- Without foot on brake, press start button twice quickly to turn on ignition, all lights on dashboard illuminate.
- Wait until all lights go out, and BEFORE SRS light starts blinking (gota be quick), then press start button again one more time QUICKLY.
- Repeat above 3 steps 3 times. voilà! Re-armed SRS.

(There might be more to it, but it worked fine for my new 2010 GT 370z)

Failing the usual 'front door' config, does anybody use products such as this with an luck; seems to be just the ticket for a lot of things:

Nissan Power Programmer - Hypertech

Thanks!

-Al.