Embedding all fonts in PDF

[Wouter Bergmann Tiest]

I am trying to convert an EPS image to PDF. My publisher requires that all 
used fonts are embedded, including the standard font Helvetica. I tried to 
do this with

gs -dBATCH -dNOPAUSE -dEPSCrop -sDEVICE=pdfwrite -sOutputFile=out.pdf \
-c "<< /NeverEmbed [] >> setdistillerparams" -f in.eps

Sadly, that didn't work; Helvetica was not embedded. However, when I 
changed "/NeverEmbed .standardfonts" to "/NeverEmbed []" in the /default 
dictionary in the file /usr/local/share/ghostscript/8.54/lib/gs_pdfwr.ps, 
Helvetica was embedded. So why does the command line version not work? Is 
this a bug? How can I get this to work without changing gs_pdfwr.ps or 
using -dPDFSETTINGS=/printer or /prepress?

I am using GPL GhostScript 8.54 on Mac OS X 10.3.9.

Thanks in advance,

Wouter Bergmann Tiest