Again, thanks to everyone for the contributions. Incidentally, we are using bluescreening (greenscreening) for the video of the actors (mostly because our digital camera caps out at 720x480) But since this show has a live element, we want to be able to project behind the live actors in realtime. On video, this would be immeasurably easier. (If anybody wants some color keying tips, just ask!)

Unfortunately, it will be a while before I can convince the director for another 300 benjamins for the technical end of this project. The projectors we have available are loaners... and it's a recent development that there are two relatively new ones available from the same source. They claim to be HDTV compliant... but I'll have to test their maximum resolution myself this weekend. If we can't get the dual monitor thing to work, maybe that will be our best solution. I'm a little worried about brightness, also. The luminance of a projection stretched across such a large space might not be enough. Again I think this will show itself in testing. The final workaround idea in my mind is a dual-PC rig... but syncronizing the two projectors (at least on fade in and out) is probably more than I can handle.

labyrinth - thanx for the update! I'm still hopeful.
patweb - thanx for sticking through this far.
DocDon - thanx for the research and kind words. I must admit that everything that I have read and seen says that windows will only support video or 3D on the primary monitor. My card will support one or the other of the displays, but not both, unless they are cloned, like you said. Maybe this is an OS thing? I know the Matrox Parahelia supports triple-monitor 3D through some driver twisting. Maybe the solution is there somewhere. Or in a different OS.

Having the concepts worked out on paper... two thousand pixels across twenty-two feet, is completely different than having it actually in front of you. HDTV resolution might look alright... I'll keep everyone posted on the tests.