anyone know how to multipex?

anyone know how to multiplex moniters?

i plan on getting 2 visualogic 9in headrest moniters and a xbox 360; once its out.

now, i want the ability to have a 2player function, with one player on each screen, but i'd rather not spend another $300 or so dollars for another xbox360 system(and system link them).

i was thinking of multiplexing the monitors so that the drivers-side moniter will show only 1st player and the passenger side monitor will only show 2nd player.

i basically want to split 1 screen in half and show the top half of the screen on the driver-side and show the bottom half on the passenger side.