If you are rooted, and you have clockwork mod installed, I assume your boot loader is unlocked.
Continue these steps or follow the ones you are using on the guide.
Select a rom, download its required components such as the ROM itself, download the Google Apps.zip (gapps) provided in the thread, if needed.
Once your following downloads have been finished, transfer both files to your SD card, I recommend you place both files in the root of your SD card, so you don't have to navigate through folders finding the rom, and it'll avoid confusion.
Power off your device and remove your battery for ten or so seconds, re-insert the battery and boot into recovery mode with the following buttons.
Volume Up and Power, hold these buttons simultaneously until you boot into cwm.
I advise you do a backup of your current ROM in case something happens, though this is optional.
Once you have done the following, wipe cache, and factory reset the data.
Proceed to the installation of the ROM by selecting, choose .zip etc etc. Don't choose side load!
Select the ROM first and install it followed by the Google apps (gapps).
Once your installation process has completed, you will be brought back to the menu, continue by selecting reboot.
Your new ROM should boot.
Hope I helped buddy.
Edited by krishang3, 07 July 2013 - 08:28 PM.