You need Distiller and virtual printer that came with PM6.5 that was installed when PM was installed. I'm not sure how you choose the Virtual Printer in Windows. As I'm a Mac user. If you don't have Virtual Printer I'm sure you can download it from the Adobe site.
Here's the tutorial I wrote years ago about setting up PM7/Win2K to create PDFs.
It's more or less the same for PM6.5
(It was originally a website, and I've saved it as a PDF.)
Remember PM6.5 is really ancient
Iechyd da! John
20:21 24/07/2009 BST