Ghostscript is the RIP that actually tells the printer how to print postscript. You will also download Ghostview which opens your prn file. If you are using Corel, you have in the printer dialog box a "device independent postscript file". If you don't have this, you will need to download a postscript printer driver. There are several HP postscript models. You don't need the printer, just the driver. Many people use the 4MV. The printer driver enables you to set lpi, angle, trap, etc. Then save file as a .prn file. Open in Ghostview, select the 1400, click OK. This is the simple explanation. There have been several tutorials on Ghostscript on the forum in the past.