Ok well its only realy possible with cars which dont have obvoius lights (xrt for example) unless you want a VERY werid car, now i suggest getting a pro kit with wireframe from masterskinnerz to fit them, all you do is copy and paste them into it then position and size on the wireframe
lol if ripping part was poor we wouldnt have any FBM skins, they all use the bmw paint job with different decals. I'm not talking about original work anyway, i mean lights that were already copied and pasted from a picture. Design dudes lights are a different story, although I've seen those ripped wayy too many times. U can look at the skins I've done. I've only used fake lights once, and i made them.
meron kang headlight? if u got a headlight paste it to the skin pero if its private dont use it :P meron na ako if u want i can pm u some skin with headlight.
I usually rip off lights. I always attempt to contact the author though, and of course, i make sure the skin is public. I have to admit, making your own is fun though. Tryed it a few times, and it did'nt end up too bad to be honest!