It seems the product specs page previously mentioned is out-of-date. This[1][2] one mentions LIDIL as the standard language, not PCL 3. Which perhaps makes things even more difficult.
dying hopes of young lads, ak P.S.: I don't know anything about LIDIL. [1] http://ln-s.net/3uhn "Print drivers, standard" under "Connectivity" [2] http://en.wikipedia.org/wiki/Lightweight_Imaging_Device_Interface_Language