I might have a similar problem with an old accounting-system from the dos-days. That system can print to a file on disk.
In the old dos-system, I choose a postscript-printer and when printing, change from a lpt-port to a disk-file and name the disk-file with the extension ".ps". Under installation of PDFCreator, I associated it with .ps-files. Now I dobbleclick on the ps-printfile in Explorer, and it is loaded in PDFCreator like a print-job.