Heres a Tutorial i made its on my site hopefully it helps: http://www.moussa-fx.net/forum/showthread.php?t=34
just download>save to (program files>adobe>photoshop ... > prestes>brushes ) then open PS>right click>load brushes>click them. +rep if it helps?
you can just download your brushes in to my documents and then when you click load brushes you go to documents and you load them