Ive read that you can "Retro fit" the stock headlamps on any vehicle for HID's.. I'm wondering if anyone has heard of this for nbs silverado for hids.. I want to put hids in my truck, but i've heard that in the stock housings there is glare and the light is all over the place... i would like to do hids in the fogs too.. so.. Does anyone know how to and is it worth retro fitting the stock head units?? Thanks