I've looked around the site for info on how to get the brushes needed to make a grunge look. And i have come across many links too this site alot. http://resources.deviantart.com/applications/psbrushes/ But how do i actually get the brushes used to make those pics? I am useing Photo Shop CS2, the latest to my knowledge. Help will be greatly appreciated.

Put them into your presets/brushes folder inside photoshop directory. In photoshop select the brush tool, right click the image and select the brush you have downloaded.
Edit, to make sure your brushes appear when you get into photoshop do what i said above with ps closed.

1. google.com
2. search for grunge brushes
3. download
4. do what grave said.