PDF Preview printer

Hi there,

I believe back in the day there was Reg keys to allow previews of PDF's before printing but cannot seem to find them.

I was wondering if anyone know what they would be. Believe they were called this before:
PDFCreatorProfiles.reg
PWPSPDFCreatorProfiles.reg
ClientPDFCreatorProfiles.reg

It created another printer along side the PDFCreator printer. The new one would create a preview.pdf on a shared drive.