You can call cZ11-V2 with the following parameters:
Using 600dpi resolution and US letter paper (8.5 inches wide) select sizeX of 5100 (600 * 8.5).
Width and height in dots of some standard paper sizes at 600dpi:
Please, be aware that the command line interface of this version of the driver is highly incompatible with the previous versions. To avoid any further confusion even the file name has changed. Unfortunately, due to major change in the internal logic it is not possible to create a perfect wrapper simulating the old interface. Of course a functional one can be created easily.
For more details visit Lexmark Z11 printer driver for Linux project page.