Install via recovery. Dumb your download zip file into external sdcard
Boot into recovery by holding volume + and – and press power button, release power button when phone vibrate.
–> Wipe Menu –> Wipe Data – Factory Reset –> Yes wipe all –> Wipe Dalvik Cache –>back to main screen –> Mounts/Storage –> Format / data and / data/media ( /sdcard ) –> back to main screen –> install zip –> choose zip from /external_sd ——> choose your zip file………done.
For rooting, just flash the Super Su ( no wiping )
Please do NVRAM backup, option in Carliv Menu. Why…because it contain your phone vital information…yr mac address for wifi, bluetooth and most important your IMEI number. Make a copy and keep in safe place.