How can I downgrade from 4.4.2 to 4.2.2 HELP PLEASE! topic

Hi all,

I have D802 G2 that had stock rom and I've upgraded to the 4.4.2 KitKat with the following manual:
http://forum.xda-developers.com/show....php?t=2665985

This is a vodafone official rom which is suppose to be rooted.

How can I downgrade back to the original 4.2.2 stock rom?

I tried the LG R&D Recovery tool and loaded the 4.2.2 kdz file and turned my phone into download mode but it doesn't work.
It keeps on saying that my phone has the latest updates by LG, I wanna downgrade !!!

Anyone can help ???