I came across this blog by Jim DiVitale purely by accident, but it is a great read, even if it is hard to find. The full url is : http://web.me.com/jimdivitale/DiVitale_Blog/Jimmy_Ds_Blog/Entries/2008/12/21_Light_ Painting_in_ Photoshop_CS4.html
but you can just click here: Jim’s Blog
The images are great and the behind the scenes info is priceless. I hope you enjoy this little find.