Ok, do they hook up the exact same as a stock headlight? Like basically unplug the old ones, pop in the new. Or is there more involved. And to make them that HID blue/white look, does that just require different bulbs?

The projectors that I've seen are just the headlights themselves. The factory lights and harnesses just plug back into them.

The blue look is done with different bulbs, the most common come from PIAA. Here is a recent thread on MNSportCompacts.net concerning opinions of different bulbs - http://forum.mnsportcompacts.net/viewtopic.php?t=10032