All the example applications in Ogre use the pop up setup window. The demos
could probably be re-written to use a config file instead. I have written
a simple app that ran without the config pop up.
But there is another problem. The GL ES render system depends on X and
uses some X calls. So even without that pop up it will still not run
without X. Modifying the render system to run without X is something I plan
to take a look at later.