there is a link to a great tutorial on the salty shores web site.
after a quick read and down loading some trial software i was up and running. i still have a lot to learn but i thought this one came out pretty cool on the grunge preset.
i used photomatix to make a HDR image and then used the grunge preset. if you go to saltyshores.com you can find the link and learn how to do it. you are basically using several shots at different exposes and then combining them or if you shoot in raw i think you can do it with one. check this out.