Help with three imagery needs

I'm currently trying to broaden my skills, and I've looked everywhere but no where could a find a night time tutorial, with clouds and stares and such. I also wanted a place to find a tutorial for rain, and perhapes a pavement texture tutorial? For a road or something of the sort, and lastly how would I make a car's headlights, that I drew, look realistic, wyhen they are turned on of course. Anyt help in these questions would be greatly appreciated.

http://www.photoshopchop.com/tutorials/rain/rain.htm
that will get you rain.
How you get headlights is by taking them off of another car and putting them on, color matching the hood and the part that the light is on and then like airburshing the the gap if any in the car.

Get me on AIM if you have anymore question about that.

For pavement, i would suggest just finding a stock photo of it...or tiled texture.

KILLER star field tutorial: http://gallery.artofgregmartin.com/tuts_arts/making_a_star_field.html

check out his other tuts too