Actually, unless you're a complete fucking retard and get IDE hard drives, you really don't have to worry about jumpers. Basically the motherboard manual has a diagram of the motherboard and where you plug all the wires coming out of the power supply.
And I built my computer without static protection or anything.
DON'T GET VISTA. IT SUCKS, IT'S FAILING, DON'T GET IT. Also, get 2GB of RAM. It's the perfect amount for today's applications and is the max Windows XP supports in dual-channel mode.
What? That's stupid, sellers sometimes leave out important information and if the PC breaks, you'll be shit out of luck. Just build a PC, that way all your parts have guaranteed warranties and you'll know how to fix problems, replace parts, etc...
Excuse me? The Conroe is one of the best gaming processors available right now. It saved Intel, and until the AMD K-10s are released, it's one of the best you can get.