im sorry, gues i misunderstood the question.
what i was wondering, you do have several detached displays on your video wall, havnt you? with a display for different zones. does this also work to get the displays for the different zones?
No, actually. It is more complicated than that. Unfortunately, running them all from a single machine doesn't work for technical reasons.
The video wall is made up of 8 Samsung 1080p 42" LCD TVs. All of these are connected to a single "server" Windows machine, and appear to that machine as effectively one gigantic 7680x2160 monitor. This works well, except that if you try to run video on it, you can't "cross" the monitor borders with any "accelerated" content, such as playing video. If you do, framerates plummet to the floor. You can imagine why! Scaling a 1080p video up to double, or triple, HD resolutions is no simple task. All of my source video basically HAS TO be 1080p, or else it looks terrible on the high-resolution display.
The system has a set of input cards, which accept up to 4 external HD inputs (either via component, VGA, or DVI), and 8 external SD inputs (composite or S-Video). These inputs run through a hardware scaler on the cards, which allows you to "stretch" the content across the monitor boundaries. The server PC has a special software application that allows you to set up virtual "windows" on the desktop for these displays. However, in order to use these hardware scalers, you MUST feed the content in through these inputs. Anything running on the server computer itself does not run through the scalers. This is fine for things like image slideshows (and I have one fullscreen slideshow that runs on MC on the server machine, to serve as a changing "background" for the rest of the display), but it does not work for 1080p video content!
So, I have three separate computers running (2 windows machines and one Mac) that feed into these HD inputs as their second monitor. The Mac just runs PowerPoint or Keynote, typically. It's secondary "monitor" is plugged into one of the four HD inputs on the server machine, and I keep the display "mirrored". The two windows machines are instead set to extended desktop mode, with their secondary "monitors" plugged into the HD inputs on the server machine. The primary display for all three of these machines is connected to a KVM in my back-room booth where all of this crap lives. The two windows machines run MC's main UI on the primary display, so that I can control what is going on without people seeing it on the Video Wall, and the video wall content runs in a detached display that I moved over to the "secondary monitors" and set fullscreen.
It works great. The best thing is that MC is so stable that it regularly runs for 60-90 days without stopping or rebooting or even exiting the playlist. Whereas I have to go down and restart PowerPoint on the Mac every 5-10 days or so (and PowerPoint on the Mac is FAR more stable than PowerPoint on Windows, which we tried at first). About the only thing that shuts down the "MC Machines" is power outages!