it's easy except for the passenger side
unless you have a little girly hands, it is nearly impossible to do because of the ABS unit blocking it.
I just got 6000k HID's and took some pix. hopefully this can help you all in the future
1) you would need an HID kit...DEPENDING ON THE KIT, you may or may not need to run the wiring harness...also get the kit that has the ignitor built in. if you see HID kits on ebay, it's the little black box (not the ballast)
2)take the cover off(i ran the wiring underneath)
3)take the wheel off and the splash guards. Little clips you need a flat head screw driver to pry the center part) then the outer part
4)take the wiring harness off by pressing the bottom(little tab) and pulling it downward. then twist the bulb LEFT and pull out. WHEN you are putting the HID bulb in, take a good look at the bulb you pulled out and make sure the bulb go in the right way. (important! or you will blind everyone and get moisture in the headlight)
5)Reverse install in order
my Silverstars& HID comparison
MY HIDs
ENJOY