Actually, MS Flight sim is one of the only multi-head games there is. You can set many things to fill an individual window, and then drag them around as usual for multi-head. The big stretch is made by dragging the window out across all the monitors. I've done three-monitor Flight sim.
He's either written some custom software or something to use more than one PC for the displays, has 5 dual head video cards (unlikely) or has a few of the quad head ones (even more unlikely considering the price).
i was thinking, with the ammount of PC's he has there, maybe he has hooked them up together to form a cluster, but I doubt 1 100mbit switch could send enough visual data. 1000mbit is v expensive, so maybe he has got 4 PCI GeForce 2 Mx Dual heddies and 1 agp dual head...... you think?
That's what I thought, but actually it can't be, since Windows only supports 8 displays What I reckon is he's got some software to simply transmit all the data on positioning etc, then each PC drives say 2 or 3 displays, rendering it itself from the data gained. Much like a multiplayer network game does, but just with one player controlling all of the views.
You can get an Eight way monitor splitter. I think it cots about £80 one of my local stores has got one, they work well, they use it on 3. Might be getting myslef one when I have the money and the monitors. Must admit that is a killer setup.
Windows supports 8 displays, but you're forgetting that DH cards appear as single displays with odd resolutions, unless they have special bios/processor setups. Let's say he's using 2 matrox G450X4 quad-head cards and a G550 DH AGP card, that's only appearing to windows as 5 displays, but can output to 10 screens. This is easily doable in a single machine. Not saying he necessarily HAS done it that way, but it's doable like that.