Combine XCode Coocoa stuff with unity how to

Hi,
i am currently trying to learn objective c by rebuilding one of my unity apps.
The reason is, that insde this app, there is only one 3D part and the rest is picture slideshows, video and text.

This seems to be much more easy and updateable, as you can just use jpgs or pngs without going through the hassle of making images power of two and son on.

Now, i am at the point where i need to combine unity with the xcoe parts. It should work like this:

  • App is starting with a normal viewController, navigation is set up in a uiView.
  • Most parts of the app are other views, and are already being accessible.
    -ONLY ONE PART IS 3D. This is a unity Scene. I would like to load/display this by touching some UIButton.
  • In case i get this done, can i put my existing XCode Navigation as a subview inside/on top of the unity player?

This should be possible, as there is the unity enhancement pack.
Also i found two hints pointing in this direction:
http://answers.unity3d.com/questions/12463/unity-iphone-scene-and-xcode-gui-possible

and

http://technology.blurst.com/a-cocoa-based-frontend-for-unity-iphone-applications/

But so far this is not enlightening me too much.
In case some of you can point me to tutorials or share ideas, this is greatly appreciated and would save me tons of time!

Ok, i got blursts article to work but am stuck with the class FBSceneManager.

They did not describe or show what that does. Did anybody every figure that out?