Bottom of the first post. Although it doesn't change it for the internet selection (the big green block around the globe)
http://forum.xda-developers.com/showthread.php?t=438445
and here is a grey set.
http://forum.xda-developers.com/showthread.php?t=430527
and there is a third set of these kicking around somewhere, but i can't remember what thread i stumbled across them in.