Late 2009 I took the plunge and bought a Matrox TH2Go, Nthusim Plus Software and two more projectors.
Here's some more picstures and and brief explanation...
I made four timber stands from 3"x"2 pine, secured them to a heavy timber base with steel brackets(six stands would be better).
Then I screwed 3 sheets of 3mm MDF to the stands (2.4mX1.5m each)
This stuffs really likes to bend, so i just positioned stands to form a nice curve of about 2.5m radius.
A shot of the projectors...
Initially i tried to "plaster" the joins, but they were still noticeable so I purchased some thick 100% cotton curtain liner..1.5m wide...what a fluke.
I simply stretched that over the existing screen using white tacs(pins with a dome head).
The screen with the new fabric stretched over the MDF:
The old Sol7 TH2GoSet-up screen:
Done! !! 7m X 1.5m (or 22ft X 5ft) Screen with a FOV of about 120'
Projectors :If you have the room: BenQ MP730 WXGA...top value and performance
I am currently designing a new 180 FOV setup using short throw projectors and 3 PC-Nthusim Config.