You'll need to:
1. install it locally
2. add a font which contains the glyphs you need (you can add the font to the OS font dir or to the converter's install dir), ideally, the actual font used in the document
3. edit fonts.xml (you'll find it in the converter's install dir)
For example, suppose I have a document which uses fonts SimHei and 華康中黑體
but on my computer, I only have SimSun and Arial Unicode MS available.
I would place entries like the following in fonts.xml:
Using xml Syntax Highlighting
<font name="SimHei">
<fallback name="SimSun"/>
<fallback name="Arial Unicode MS"/>
</font>
<font name="華康中黑體">
<fallback name="SimSun"/>
<fallback name="Arial Unicode MS"/>
</font>
Parsed in 0.001 seconds, using
GeSHi 1.0.8.4
After editing fonts.xml, be sure to restart the pds conversion service, so it re-reads fonts.xml