Search around the forum for various retro fit headlight threads. There might be a few threads with pictures left to view.
Basically you have to remove the lense, cut open the rear of the headlight, fit the projectors in and make them fit/stay in place. Test fits and aiming them to make them straight and level, then seal them back up.
I did some on my car 3-4 years ago but I don't own it anymore. I bought everything from the retrofit source and a VVME HID kit.
Some old pictures.
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