Hey Bill,

Sounds very simple to me... Just apply a submix to each screen, and then give each submix the offset on the X-axis so they are aligned next to eachother. When you do so you basicly create one big screen existing out of 4 little screens, being it a plasma or projector... So the triple head will be needed to create 4 screen outputs from you MAC.

Then with programming you can move your content around the screens simply by using the X-pos parameter...

Offset values can be as follows.. 1st screen -3, 2nd screen -1, 3td screen +1 and the last one +3...

Hope this helps you.... otherwise contact me...