Firstly thanks for your efforts above! Tut was good and info too.
Since upgrading I received 2x ZUI updates and am now on the newest version.
I'm having so many problems now, my phone is a borderline frisbee!
Managed to install Google apps via Aptoide easy enough and now have everything installed.
Problem I'm having is: when closing apps; they don't run in background which means, WhatsApp's emails, etc. don't come through unless you go into the app. Secondly the settings do not save, so as mentioned above, setting the assistant also changing keyboard etc.
Does anyone know a fix? Is it worth reverting back/updating to the newest global ROM?