Ok, this is the best I can do to improve it:
I also tried to make a standard (halogen) white headlights mod, but it doesnt look as good as the Xenons (see pic below).
So I think I will just release the Xenons. I'll just wait a few more days to see if I can think of another way to improve the headlights texture.
P.S. I should have mentioned the purpose of making this mod in the first place. Its not to enhance screenshots, but to enhance the gameplay.
![Wink ;)](./images/smilies/icon_wink.gif)