here are a bunch of grunge Brushes.. I zipped them for you..

http://www.givemegraphics.com/forum2/uploa...ledb/grungy.zip

http://www.givemegraphics.com/forum2/uploa...edb/grungy1.zip

http://www.givemegraphics.com/forum2/uploa...edb/grungy3.zip

http://www.givemegraphics.com/forum2/uploa...b/grungymix.zip