How to include java code into freemarker's data model in fmpp?

Hi all,
How can I specify FMPP to include some compiled java code or jar files
in the freemarker classpath? I need it because I want to use some of
the functions written with java from freemarker templates and because
FMPP instanciates freemarker instance, I can't affect a classpath it
passes to it.

------------------------------------------------------------------------------
This SF.Net email is sponsored by the Verizon Developer Community
Take advantage of Verizon's best-in-class app development support
A streamlined, 14 day to market process makes app distribution fast and easy
Join now and get one step closer to millions of Verizon customers
http://p.sf.net/sfu/verizon-dev2dev