Converting .SPL files to PDFs

Can anyone help me with this?  I'm trying to convert some Windows (XP in this case) spool files (.spl) to PDFs.  This is proving frustratingly difficult.  As I understand it, I should basically be able to copy them to a printer.  

eg copy file.spl \\\\Server\\PDFCreator

When I try copying them to PDF Creator though, they just appear in the print queue and get deleted.

 Any suggestions?  Is there an easier way to do this?