I have exactly the same setup with an HPLjet6L attached to my Windoze PC. I have Final Writer 97 installed in my AmiKit WinUae setup. In WinUAE "Game& I/O ports" setings I set the printer to the HPLjet attached to the parallel port. I select the HPLJ6 workbench printer driver in the Amiga printer prefs. All works fine.
TrevorDick