Forgot how to send Plot directly to plotter

I used to be able edit a plot driver to make plot files, pdf's and/or send a plot directly to the plotter. It has been a while since I did that and now I need to send directly to the plotter. I remember modifying the line "defallt_outFile/auto_overwrite= "lpt1". I don't remember what else I needed to send to "PXXUSSND.........". I am trying to modify the hplg2.plt file. Please can somebody jar this old mind????