[HOW-TO] Installing XBIAN directly on RASPBIAN IMG

[gark81]

Hi all,
I'm a noob with RPi2

i wish to install kodi & Retropie (and other packages) over Raspbian Lite base
I try Xbian RPi2 image, but i like to use "pi" user instead of "xbian"
and use "ext4" format of Raspbian instead of "btrfs" of Xbian

Then, if i install Xbian package, kodi autostarts automatically?

I have been amazed with the integration of xbian -config in Kodi , and I would like to keep it.

Is all this possible?

How should I do this?