PXES 0.8 Dual Monitor

Greetings,

 

I'm in the final stages of optimizing the kernel we're using for PXES 0.8,
and last on the list is making the dual monitor ability on the thin clients
work properly. 

 

Currently, the dual monitor capability works as far as cloning the display,
but obviously this isn't what we need. Very simply, how do I change this to
a desktop that spans the two monitors? I imagine the geometry would be
something like 2048 x .. , is this something that I need to change in the X
config, or somewhere else? 

 

Since the second monitor is working, I would assume that xinerama is working
properly, and just needs to be reconfigured. Any help is muchly appreciated.