Thanks for this guide which worked perfectly.
PLEX was just what I was looking for. I now have a great UI on my Samsung Smart TV's including all Metadata and Artwork, it is amazing.
It also works great with the IOS App and I can stream from 3G etc or Syncronise to my iPhone for offline viewing.
My OMV now effectively is a Media PC aswell and as its on 24x7 already this is a great addition.