how to release a installation package

Hi, dear all,
I meet a problem when trying to make installation package
out of my
sipcomm copy. When I try to make a windows installation
pack, the
error is:
-- taskdef class com.izforge.izpack.ant.IzPackTask cannot be
found
When I try to make a dmg for mac, it says:
taskdef class net.sourceforge.jarbundler.JarBundler cannot
be found

Does it means I need to download these jars and put into the
CLASSPATH?

Btw, the browser launching problem has been solved. All i
need to do
is to add com.apple.eio to the manifest.mf, where I use it.

-- 
BR
NIE PIN
TMLHUT, Helsinki, Finland
ANTDNIST, Gaithersburg, USA
Ph: +1 (301)975-6049

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