Hi,
I am afraid PDFCreator 1.2. is no longer supported (or do you have PDFCreator Server 1.2, which is the latest PDFCreator Server release and obviously supported?). You can probably use the PDFCreator API / COM interface to automate this, but it will require some programming knowledge. Alternatively, the free create module for our editor PDF Architect contains lets you merge all printable files inside a specific folder into a single PDF with a single batch convert job:
http://download.pdfforge.org/download/pdfarchitect6
Best regards
Robin