Installation of the rom is listed halfway down the first post. Since you are running the January RUU. you will need to flash the old firmware patch in the Cleanrom folder on you're SD card. You will need to be unlocked. Don't forget to re-flash Amon RA & delete any current PH98IMG's off your external sd card.
Oh also, your freshly RUU'd rom. Let it boot to a home screen at least because you will need to get access to your SD card.