4.4.4 theme engine on 4.4.2

Hi,
is there a guide how to get 4.4.4 theme engine on 4.4.2 ROM's. I tried replacing the secthemechooser from a 4.4.4 based ROM but it still does not pick up the 4.4.4 based themes.

Thks in advance.

Can the CM12 theme engine be ported to stock firmware alone?

Guys,

Recently, I am struggling between using cm12.1 and stock .222 firmware foe my Z because they both have something I desire ( system ui and camera for .222 and cm theme engine for cm12 ). My question is can they exist on my phone at the same time? If so, what ROMs or addons should I apply to my phone?

Many thanks!
(Sorry for my poor English)