The terminology in AutoCAD's CONFIG menus assumes the adding, configuring, or deleting of "printers." What is received from HP is a single driver which provides access to many printer models, as well as to the HP LaserJet III and 4 printers. For the purposes of the list of available "printers" in AutoCAD's CONFIG menu, HP calls this driver:
!! HP-GL/2 ADI 4.2 v 2.3 by Hewlett-Packard
For each supported printer model, the driver software contains a file with an extension .CFG, for example DPROPLUS.CFG for the HP DraftPro Plus printer. This contains the default configuration for sending plots from AutoCAD Release 12 to that printer.
Select these .CFG files in the first dialog box of the HPCONFIG command, which is available as a command in AutoCAD. A detailed explanation of all the dialog boxes in the HPCONFIG command is located in "HPCONFIG field-by-field" in section 5.
To plot a drawing using any of these configurations, select or create them in HPCONFIG and also add them in CONFIG. So CONFIG is used twice -- to add the driver in the first place, and then to add each printer configuration, although CONFIG calls them both "printers".