Stealth Nitrous switches?

Well, I had to take out the Nitrous for smog. Took it all out to sell, but I'm having second thoughts. I think I want a stealth switch system, I was thinking of using the traction control button to activate, vert switch to open/close the bootle, and maybe the horn for purge? These would switch over to these secondary functions when traction control is turned off.

I need an on switch, auto bottle open/close, and purge button.
Any ideas?