FOR INSTALLING KITKAT ROMS YOU NEED LATEST CWM RECOVERY
COMPILE OR PORT LATEST CWM OR TWRP RECOVERY FROM HELP OF XDA.RECOVERY MUST HAVE SELINUX SUPPORTED.
IF YOU CANNOT PORT OR COMPILE RECOVERY THEN USE UPDATE BINARY PATCH TO BYPASS KITKAT INSTALLATION.
DOWNLOAD UPDATE BINARY FILE FROM- HERE
REPLACE THIS UPDATE BINARY FROM ROM’S UPDATE BINARY WHICH IS LOCATED UNDER META-INF.
HOPE THIS IS ENOUGH.