I was wondering if anyone here has some experience using the private
frameworks that come
with the dev tools or pointers/online docs?
Specifically I would like to be able to open a nib, add a class and/
or outlets/actions.
You want to do the above to what? For what purpose? I think we need
more information to give you a helpful response.
Anyway if a framework is "private" you should use it for anything
other then research and fun... don't release a product based on it.
Also consider that you may not have the right to ship the framework
(assuming it isn't part of the OS).