Most modern browsers support embended objects so it shouldn't be a problem. For Netscape Navigator users, add the "href" so the PDF file opens when the PDF image is clicked-on.
also with EI you can you use <object></object> <OBJECT CLASSID="clsid:CA8A9780-280D-11CF-A24D-444553540000" WIDTH=450 HEIGHT=450> <PARAM NAME="SRC" VALUE="example1.pdf"> <EMBED SRC="example1.pdf" HEIGHT=450 WIDTH=450> <NOEMBED> Your browser does not support embedded PDF files. </NOEMBED> </EMBED></OBJECT>