Where to put externals and stacks in OS X bundles?

[Dar Scott]

I _think_ this is where externals and stacks go in an OS X application 
bundle, but I'm not sure:

myApp.app
     Contents
         MacOS
             myApp
             toolX
             toolY
             toolZ
         Resources
             libStack1.rev
             libStack2.rev
             libStack3.rev
         PlugIns
             externalA.bundle
             externalB.bundle
             externalB.bundle

Is this right?

Stacks and externals might be exceptional in some way.

Now what about externals used by the library stacks?  Where do they go?

Dar Scott