There's a post somewhere around here with a write up on how to do the fog mod. I've done it...It's really simple. Run 2 wires from your stalk to a relay under the hood. A bit more detailed than that, but that's it in a nutshell. As far as installing your HIDs, the ballast and bulbs should be all plug-n-play, but you'll need to drill a 21-22mm hole in your dust cap to fit the wires through for the bulb harness. But with 8000K bulbs, I think you're going to run into some issues of rice filling your engine bay. Unless you're a Vikings fan, I'd stay away from that combo.
If I can find the fog post, I'll link it for you.