Well... this is somewhat out there but I think all you DIY'ers may enjoy reading through all the documentation (maybe even daisy chaining multiple projectors together).
The whole idea of
Deskalign is to sync multiple projectors together for the purpose of ultra-large rear projection.
...keystoning... and its not too far off topic, because deskalign implements keystoning as well by means of geforce gpu's.
24 projectors...

= one freakin' huge display