Click Add a local printer:
On the existing port dropdown, select FILE: (Print to File) and click the Next button:
Select HP from the Manufacturer side and on the Printers side, locate the first PS driver you see (HP Color LaserJet 2800 Series PS in my example):
Click the Next button.
Click the Next button on the Type a printer name window:
The install process should go through and the next window is the Printer Sharing screen. Leave as selected and click the Next button:
Click the Finish button on the You’ve successfully added window.
Return to the Levy Documentation: Step 2B Section Postscript Printer Configuration.