@Arroyo and @WahyuGo
Could you finish your currently pointless argument? I'm pretty sure, that all members of XDA are bored with it. Please find some other place to finish it, do not mess every thread about JB.
If you have MB4 already installed, than you can skip pit file and just flash MF1 as PDA. After that flash kyrillosv8
In majority of cases nothing and you will have Kyrillos's rom with your current apps.
If you encounter some problems, you can repeat whole procedure with wipeing system/data.
Has anyone tried to flash back to GingerBread for some reason?
Is someone able to write guide how to do that?
Just look few post above and read them. How did you look for it?
You got it in post #606.