the problem is that method was for ics, since the upgrade to jb that method no longer works, but luckily using fastboot to install cwm then running the generic root.zip floating around does work just fine. and installing cwm through fastboot is pretty simple other than the occasional driver problem which is covered in various places around this section, especially with my aio tool doing all the commands for you at the push of a button. i even wrote a tutorial about adb drivers which applies to fastboot (kernel debug as they are called in the device manager) just as well