Alright, I'm trying to add an additional layer to my vehicle security I'm curious if someone could help me with a latching relay setup where I could hold down my (currently unused) cruise control switch while cranking to get the car running and also activate the fuel pump relay and then keep it energized until the car is turned off...

I know how I want it to work, but if anybody has setup something similar I'd be interested to hear how you wired it exactly...