along time ago i tried to do that and i took apart my cruise control switch but couldnt figure out the wiring. theres a shit load of pins and wires behind it. the bulb in the switch was dead so i changed it while i was at it and thank god i got everything to work again after i spliced the shit out of the switch.

i got my nitrous activation switch and bottle warmer switch in my cig tray and my purge button in my coin tray . when i need them i just open the trays and pull the switches/button out.

NOS Zex? wth are you talking about. NOS and Zex are two different companies. Zex is a good system for starters, but i personally dont like it.