I would highly suggest, after you finish prying off your lens, you let it cool down before taking off the reflector, you don't want soft plastic adjustment tabs to morph. (IF YOU DO A OEM Projector Retro).
It all depends on the type of projector you would want. If it's a Bi-Xenon it might be a little harder and would cost more. If you can provide the HID parts I wouldn't mine installing them for a reasonable cost.