PST Merge is a utility to help the user to merge several PST files into a single PST file. This powerful utility combines several advanced features but it is easy to use for merging all the items of PST file such as: the contacts, calendars, newspaper, tasks, folderd and e-mails to an other PST file. It can also used to merge Outlook calendars, Outlook contacts and address book. You can download free of charge the demo version from this site. It is compatible with Windows Vista, 2000, 2003 and XP.