font and embedding FOP question

[Steve Albin]

I would like to use additional fonts with FOP, where FOP is embedded in a Servlet. The instructions at http://xml.apache.org/fop/fonts.html say to use the –c conf/userconfig.xml option on the command line in order for FOP to find custom font information. However how do you specify this information when FOP is embedded (e.g. when using the FOP APIs)?   Thanks, Steve