Hi, regarding you issue on granular restore of calendar items, Lucid8's DigiScope
http://www.lucid8.com/product/digiscope.asp provides the ability to OPEN, BROWSE, SEARCH, EXPORT and RECOVER all messaging items from offline Exchange 2010, 2007, 2003, 2000 or 5.5 EDBs & LOGS. All items are accessible including email, tasks, notes, calendar appointments, and all other messaging items and you don't need to use RSG's, Active Directory or even the Exchange server unless you want to restore to it and then of course you need to be able to connect to the desired mailbox
Troy