I had an HID kit from before so I just had to change the bulb out per say. I also spliced in the hi/lo wire to enable the solenoid to get the hi/lo feature.
I used the shroud that came with it(mini gatling gun)free of charge. Its simple cause it just screws into the back of the projector.
I dont know if you have run across this website: HiDplanet : The Official Automotive Lighting Forum it has tons of info for any thing you can think of as far as retrofitting your headlights and other lighting upgrades. Good luck girl!!