I think, this could be possible!
I would recommend t check out the MATROX site, they are the only company which produces grafic cards with 4 outputs I know.
In Resolume, you can configure each output and what you want to have dispalyed (eg. Output 1 - Layer1, Output 2 - Layer 2, Output 3 - Layer 3, Output 4 - Preview Matrix).
If I understand you right, you want to divide one big "panorama image" into 3 separate outputs. If so, it is your job to prepare your footage properly (that the edges fit together) in after effects for example.
But I guess, this kind of use will need a beast of a computer.... no matter what software u use.
anyway, i really like the idea. good luck!
[Edited on 1-12-2004 by therandelman]