Santa, you can go through the wikis, and learn how to duplicate/backup an elgg site. (http://docs.elgg.org/wiki/Backup_site, http://docs.elgg.org/wiki/DuplicateInstallation) If you need only to duplictae the userdetails, you need export them and import in a new table. I have done this several times before. If you need proffessional support in doing it, pm me.
Regards, Team Webgalli
http://webgalli.com
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