http://hints.macworld.com/article.php?story=20060203175741232
Note: with above method, the fonts are embedded, but it will not pass IEEE conference paper pdf checks, because the pdf version is older than adobe 5.x. I tried many other methods but all of them cannot embedded all fonts due to some errors.
Finally, I use similar steps as the link to create a PS file instead a pdf file. Then convert this ps file with Adobe distiller on a Windows machine.
