Default From KK Beta to B118CN?

Hello,

Sorry, if this has been already resolved, but I couldn't find anything. I'm trying to install HYD52ROM V5, but I cannot downgrade to B118CN. Could someone please advise me the exact steps to downgrade from KK beta? I already tried the steps here: http://forum.xda-developers.com/show....php?t=2566453 - no luck. I'm on the latest recovery for KK.

Thank you very much in advance!