Some journals and conferences require all fonts to be embedded when the paper is submitted. Here are some tips on how to do it, thanks to Teo de Campos (except where stated).
gs -dSAFER -dNOPLATFONTS -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/prepress -dSubsetFonts=true -dEmbedAllFonts=true -r600x600 -sOutputFile=paperPDFexpress.pdf paper.pdf
Try something like:
foreach f(`find . -iname '*.pdf' `) echo $f pdf2ps $f $f[1]:r.ps end
If you are required to provide separate Postscript images, you can do something similar:
foreach f(`find . -iname '*.png' -o -iname '*.jpg' `) echo $f convert $f $f[1]:r.eps end
Next: compile using latex and dvips, and upload the PS/EPS file(s) (not the source, not the PDF)