Embedding fonts in pdf graphics

I know you can control this with the cairo package, but I was hoping 
that embedFonts( ) would provide a way to embed all fonts, not just the 
non-standard ones.  I'm submitting graphics to a journal that wants 
Helvetica and Helvetica-bold embedded for some reason.  Is there an easy 
way to do this on a pdf graphic created wit pdf()?  A linux system 
command would be excellent for my purpose.

Thanks
Frank

Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University