[Zope] __bobo_traverse__ and context.

I have a Zope product that uses a 'skins' folder to allow easy customisation. Using a custom __bobo_traverse__ I am able to check various subpaths and return the correct object, HOWEVER the returned object is in the context of the skins folder, which screws up navigation. How do I make an object appear to be in the current location rather in the skins folder? I've tried working out how CMF portal_skins does it and believe it has something to do with __of__, but can't figure out exactly how.