Well it looks pretty rad, I like the design a lot. The only thing I'm not loving is the font, but you know me, Helvetica or nothing Themes section is a good idea, though. Just checked out the thread over at XDA.
Follow the link in the description Download the .mtz file and rename it to .zip Find the icons in the .zip file and add them to your phone. That's about what I can tell you, don't know squat about modding iPhone, sorry :/ And thank you (: