Indeed they did do "research" on headlight codes, if I remember correctly all the research dried up! If you look hard enough though they might be floatin somewhere out there in cyberspace. But where those codes went I do not know... but I think they were for gs2v2 and they had some error. I wouldn't bother with the headlights, and Chaos is completely right about the colors. In fact I remember some experimentation with changing colors and body components but that dried up as well (it was unsuccessful).