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This is probably not USEFUL information for anyone but it might be interesting...
I have a Matrox G450 dual head card here at work. With the OLD drivers, the two monitors appeared as a single 2048x768 screen to windows and all programs. MA2wide would span these two monitors as one might hope...but MA2 ran like a crippled slug.
[Oh, by the way, the early beta MA1.1wide worked wonderfully on this configuration, spread across both screens.]
I recently loaded the newest drivers for the G450. Ostensibly this update supports setting different resolutions for each monitor, but it has the side affect that once configured that way (even though both monitors are set the same resolution), WinXP now allows you to "extend desktop across second monitor". For most applications this is MUCH better behaved than the single large virtual screen of the older drivers. As for MA2 -- the good news is that it now runs at a good framerate; the bad news is that it now clones MA2 on each screen as described in this thread. So it's not QUITE as cut-and-dry regarding how it'll behave as it might seem from this thread...it obviously also depends upon the board(s) and the drivers used.
Now at home I have a dual head set-up using an ATI AIW 8500 and an nVidia GeForce 4400ti PCI. This works like I described the G450 with the newest drivers, but MUCH better performance.
[And yes, as someone mentioned, once you've tasted dual-head you'll never again be satisfied with a single monitor.]
Joe
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