mobile

Hi,

I just want to install a custom rom for my z2 but i'm having a little bit of trouble figuring out how to install it.
I was interested in installing the resurrection remix rom found here http://forum.xda-developers.com/xper...remix-t3028260
I'm currently on the official 5.0.2 version of android. I upgraded from 4.4.4 to 5.0.2 through Xperiafirm.
As far as I understand you need to have both root, an unlocked bootloader and a custom recovery to install a custom rom. NOTE: I have met none of these requirements.
My problem is I cant find a way to root my z2 on 5.0.2 or unlock the bootloader for that matter.
From what I gather most people upgraded from 4.4.2/4.4.4 using a rooted z2 to a 5.0.2 pre-rooted rom to keep there root permissions.
Does this mean I'll have to downgrade back to 4.4.2 or 4.4.4 and then do one of the easy root processes then flash the custom rom?
Or is there an easy way to root and unlock my bootloader on my z2 on 5.0.2 so I can flash the custom rom?

Thanks in advance for the help guys.