So if my final resolution is 6000x6000, and with 4 Squares, then:
In command prompt, not in script editor; after closing Maya;



Render -x 6000 -y 6000 -xl 0 -xr 2999 -yl 0 -yh 2999 -im lower_left myfile.mb
Render -x 6000 -y 6000 -xl 0 -xr 2999 -yl 3000 -yh 5999 -im upper_left myfile.mb
Render -x 6000 -y 6000 -xl 3000 -xr 5999 -yl 0 -yh 2999 -im lower_right myfile.mb
Render -x 6000 -y 6000 -xl 3000 -xr 5999 -yl 3000 -yh 5999 -im upper_right myfile.mb





"Render -x 6000 -y 6000 -xl 0 -xr 2999 -yl 0 -yh 2999 -im lower_left" C:\ "Documents and Settings" \ "filou" \ "trial" \ "balls.mb"

"Render -x 6000 -y 6000 -xr 2999 -xl 2999 -yh 2999 -yl 0 -im lower_left"'
n'est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.

Which means:


"Render -x 6000 -y 6000 -xr 2999 -xl 2999 -yh 2999 -yl 0 -im lower_left"'
is not recognize as an intern or extern command or(?) an executive programm.....

Please help