The printers setup file (OEMSETUP.INF) should reside on the disk distributed with the WPD file. This file follows the standard format used in the Windows CONTROL.INF file. It contains a [io.device] section that lists the PostScript
printer names for each set of WPD files included on the disk. The file has the same form as the following example:
[io.device]
7:pscript.DRV,7:L630_52&.WPD,"Linotronic 630","DEVICESPECIFIC"
If the user tries to install a printer that is already installed, the printer driver will ask whether the previous WPD file should be updated.
Manufacturers that are already supported internally in the driver should not
provide WPD files with names that conflict with those used internally. If an
update is required, add the PostScript version number to the printer name (in
both the OEMSETUP.INF file and the “*NickName” section of the PPD file).