I've done this both ways buying a trick switch panel and wiring it through relays and stuff myself. This year I went with the K&R Super Duty Switch Panel its a bit more then the painless but a lot less time and ALL the wires you will need are there. It has a nice wiring diagram that shows you how to wire everything. Nice switch panel. It comes with everything you need besides the tools.
Saved me 2 weeks work with it ... by far the best and easiest way to wire a race car.
Forgot to mention the wires are labeled end to end.