Outputting for multiple screens / projectors

Hello everyone
I am preparing a video installation that I would like to project through 3 projectors onto three walls side by side. I would like to slide video clips from one wall onto the next or even stretch one video footage onto all 3 walls. (with the effect that subjects from one wall glide onto the next wall without the audience perceiving any dividing lines)
How to do that? Doe anybody have experience with such set-ups? I was thinking that maybe I could define my project settings with a video frame that would have the hight of a standard 4:3 screen but its length would be 3 times as long. I then could insert three separate footages: one to the right, one in the center, and one on the left. - DOES THIS IDEA WORK?
and if it works, can I then just burn a simple DVD (using DVD studio pro)? What would be the final result: 3 small projections or one big image stretching (as intended) over the area of 3 walls/projectors?
I hope I could explain myself clearly enough! If my text seems vague, then it is because I can't really predict where during the production I could encounter problems. And it's good to start a new project with the right decisions.
thanks for your suggestions and help,
Hynek

I had the opportunity to talk to two video-artists and this is their solution:
*Matrox TripleHead2Go* http://www.matrox.com/graphics/en/gxm/products/th2go/
(The company offers different multiple screen solutions)
you then just edit your film on a 2160*576 Frame = 3*long normal Frame (720*576). Just make sure your pixel aspect ratio is the same as the imported video. I use a square pixel aspect ratio.
Nevertheless, thank you for your support!
Hynek

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