The printer driver listed as "HP Laserjet 4/5/6" does not fuction with a HP Laserjet 5MP. No big deal, the driver listed as "Postscript printer" does work, but it is very misleading because during the install process when you see your exact printer listed and then the driver doesn't work it can be very frustrating. By the way, the Laserjet 5MP is a Postscript printer.
an explanatory not saying not to use that driver for postscript printers has been added to the latest rhs-printfilters.