[Rails] need help deploying rails engine

I'm having problems deploying a rails application that contains engines.

When I had namespaced routes (Engine::Application.routes.draw) in
routes.rb, I was unable to get past the "no such file or directory" errors
from apache. The request never got back to the application.

When I used global routes (Rails.application.routes.draw) in routes.rb, I
can not direct the request to the namespaced controller. I get
"uninitialized constant" with the non-namespaced controller name.

The Getting Started with Engines<http://guides.rubyonrails.org/engines.html>Rails Guide does not include information on deploying an application
containing engines.

The relevant portion of the apache configuration is:
/var/www/html/links is a symbolic link to the public directory of the
deployed application.

A solution to either problem (namespaced or non-namespaced) is acceptable.
A solution with namespaced routes is preferred.