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Keep in mind also at version 10.1 there will be a 'Create Enterprise Geodatabase' tool for this operation as well instead of running through a complete Post Installation Wizard.
"The Create Enterprise Geodatabase tool creates a database, storage locations, and a database user to be used as the geodatabase administrator and owner of the geodatabase depending on the database management system (DBMS) used. It grants the geodatabase administrator privileges required to create a geodatabase, then creates a geodatabase in the database. "