This task did actually cost me quiet an extensive amount of time.
The steps in this tutorial will teach you how to add new zones to the current PlatformUI for eZPlatform.
Just to prevent any confusion, I know there is a Tutorial for adding new tabs beneath existing zones likes "Content", "Page" and "Performance". This is explained (pretty well) in the developer-documentation created by eZSystems. What this will teach you how to add a new zone to the system.
This (more or less) will be the result after the tutorial. Never mind the missing "Page"- and "Performance"-zone... that's just CSS.
Keep in mind that some places might be a little hack-ish due to me just starting to grasp how to use the code within the PlatformUI.