Steps on installing Navi-X on Apple TV 2

I tried searching from the internet on how to install Navi-X and other kinds of plugging on my Apple TV 2. I was able to find something that refers me to Apple TV 1 and to some folders in which I could not find in my Apple TV. Can somebody please tell me where XBMC application is located on Apple TV 2 (which I logged in as a root)? How do I install Navi-X or any other kinds of plugging? Any links for a tutorial or a step-by-step procedure will be highly appreciated.
