There is another option that have I used many many times in the past and its far cheaper than these options. Depending on the plasma you use, It may have the option to blow up the image to 3x or 4x then slide the image to the portion you want on each screen. I did this in a club once that had 3 screens behind the dj and the process only took like 20 minutes to complete. The owners were so impressed they doubled my vj fee for the night for showing them how to do it.
“Just because noone understands you does not make you an artist”