Right first i will show you some of my brushes i have made.These are the covers for my sets. I have made 3 overall. 1~Go to a search engine and get a picture that has lots of detial but hardly any text or pictures in it.By pictures i mean anything that you dont want in your brush. This is the picture i used,In my experince i have found that useing sky,grass and a dirt path make very nice grunge effects.I got the pic from google and used the crop tool>< to cut out the section i want to use as the brush. Pic in google 2~ Press Ctrl+Shift+U.This will desaturate your picture which means it will turn black and white and the colors inbetween. 3~Press Ctrl+M Which brings up your curves menu you can also acess this screen by going to Image>adjustments>curves.Try to make your screen look like mine and your image should be looking a bit like mine aswell. 4~Were almost done now! Get out your lasso tool>< and set its fether to 25 pixels 5~Then chose the bit of the picture you want to be the brush. 6~ noe go to Edit>define brush preset and click OK.Now if you look in your brush section it will be the last one. 7~ This is the final brush you have made.It might not look the best here but combine it with others and you will become great very soon. Well done you can now make brushes for your own use on photoshop CS.If you want to submit brush sets you have made either post them here or in www.deviantart.com.