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Let us know what you want to duplicate, and I am guessing we can come up with an answer in xoops. I looked at Joomla very hard before I made the decision to "go xoops". I could not find much at all that you couldn't do with XOOPS that joomla offers. Even if XOOPS does not offer it, fins a php script and wrap it into your XOOPS site. It's that easy.
-Matt