I don't have the links to those specific stocks that I used, just search for starlight on DA and google etc.
Put the stocks blend mode to Screen and then erase over it with a Soft Brush at 20% opacity.
Try it out, have fun, find your own ways and you will progress well ;)
Ain't gonna write anymore tutorial for some time because it were not longt time ago since my last. The techniques I've used is pretty simple and easy to explore and discover by yourself, after all that's how I learned them ;)
You got the basics tools now, just go ps nutts!