The whole front end is one piece and removing the nose alone can't be done. When you remove the front end, the lights and everything come with it as all you do is disconnect the leads. I don't know how they put those darn things in as I can see the whole mounting cavity from inside the air intake and there are no bolts or screws that goes to the little bracket on the bottom of the lights. The only thing going into the cavity besides 4 bolts that help strengthen the front end by bolting to the frame are the lights leads. But they had to get them in there some way and by them being on a swivel to tilt them up or down I would guess there is supposed to be a way to adjust them.
Ron