Maximize in 4 monitors 2x2 setup

[satrucci]

Hello people!

I'm not sure if this has been discussed previously, but I'm unable to find it.

I have a Dell Precision T7500 with 2 nVidia Quadro FX 5800 video cards. Each of these have 2 DVI outputs connected to a Sony SRX-105 projector which receives the 4 outputs of the machine. I have setup that the 4 inputs as a 2 by 2 screen size with Xinerama and TwinView, but the problem comes here:

Whenever I need to maximize a window, it just does it in either the top "X screen" or the bottom "X screen". Is it possible to do it in the 4 monitors, as if I were working with "one big screen"?

Thanks in advance for your answer.

Regards.

PS. I'm attaching my current xorg.conf.