We have purchased this cool product that converts rPreview emf files to pdf via a dll (not a printer driver).
We have modified our rPreview to allow the user to click a btn to very easily send the preview to a pdf. Becuase it uses a dll instead of a printer driver its convenient and fast as well.
Their support has been excellent in resolving a pie graph issue we had.
I can recommend ths product to others.
Peter