I just want to tell all that I've found the info at DK&A's home page
about my problem with printing from Laserwriter 8.4.3 and using
InPosition in Quark.
Many thanks to Stephen K. Suh for tips and tricks around this question!
My Inposition & InpositionLite for Quark doesn't work unless I use the
PSPrinter driver in my Mac. Anyone seen an updater or something???
8. DEC Manuals