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AFAIK, AppleJack only offers these 5 tasks:From Applejack's "Read Me:"
Beyond these basic functions, AppleJack can also test your RAM (if you choose to install the included memtest), disable auto login, disable login items for a user, and clear out your NetInfo database--readying it for being reconfigured by the Apple Setup program. These last options are only available from the expert menu (accessible by hitting x from in AppleJack's main menu), and should be considered experimental at this point.