Nitrous with a 4spd

can someone explain to me what a full throttle switch is and how it works? and maddart i dont mean to hijack the thread, so if i am please tell me and ill take it to pms (though this seems like a good place to ask since you guys all know alot more about this then me) Duster Don, i ended up getting the same ignition box as you (the mallory 685) and as far as i know it only has a window switch...my car is also a stick like maddarts, and i will be having the two step and line lock wired up to a button on my shifter knob, so i will need to have the button for nitrous on my wheel...purgeing, remote bottle opening, and bottle heating are things i will worry about for later, but i want to understand what i will need for nitrous to work with my tranny and ignition setup and if i should be depressing the nitrous button during shifts (no powershifts for me or ill kill my tranny)