so you have 3840 x 1024?

here are the numbers you would want to use to put 1 full screen on the middle monitor, and divide the 2 side monitors up.


left monitor
0,2560,0,512
0,2560,512,0

middle monitor
1280,1280,0,0

right monitor
2560,0,0,512
2560,0,512,0

just did the math in my head, so don't kill me if its not right, i'm also too lazy to check it