i know this sounds dumb but i wanna use my p4000 to maybe activate my nitrous on my car lol is there any possible way?

No. That would require a wire in the 4000's harness that is only powered when you press a special button on the user interface, and I doubt the unit has that. Why not be creative and make a retractable button in the cigarette lighter like Vin Diesel in FATF

yeah cause it doesnt work like that lol... idk just thinkin... but yeah im new to it i havent had it very long anything i can do backgrounds or such?