HP 650C DesignJet Plotter Driver

Maybe somebody knows where we can get a driver for the HP 650C DesignJet
Plotter (We are using grass4.1). We also have a Summagrid IV (24"x36")
digitizer but do not know how to configure it.

Thanks in advance for your help,

Enrique Mafla
mafla@sis.poli.edu.ec

Please reply to my email address. I am not subscribed to the list.
Thanks.