Control of the Page Width Using the WinPrint Print Processor and PCL 5

Xref: kermit microsoft.public.windowsxp.general:1082868 microsoft.public.windowsxp.print_fax:57601 microsoft.public.word.newusers:73869

Could someone please explain how I can control the printable page width on my printer. My printer is set up for PCL-5 and I have zero margins set in my printer and also in the "Letter" form and therefore was hoping I could print an image file to almost th
e full 8.5" page width. However, results yield a page width of approx. 7.9-8.0". If I set my printer to Tiff mode and send it a tiff file by copying to the port direct therefore bypassing the winprint processor (or atleast I think it does), it prints the
full page width or close to it. I am not sure if this is a Winprint problem or the PCL-5 implementation within the printer.
If anyone has any ideas, or can shed some light on this, I would appreciate it.