How to emulate display?
 

We're running http://simile.mit.edu/wiki/Crowbar and it's telling us we need a display.. how do we get around this? I'm thinking display emulation.

Does anyone have experience with this script?

Here's what happens:
[root]# xulrunner application.ini
Error: no display specified

Seems like an X server is indeed needed to start the application.
Searching on Google for "headless xul applications" I've come across some comments which suggest to use Xvfb (read here and here for some tips) which is an X server with no graphical output (all graphics only go to memory).

I've tried this already as well.. still the same output..

no display specified means the variable DISPLAY is not set. So you need to start an x server and set DISPLAY accordingly