This article explains the use of Sites, which have been replaced by Access Keys after 7.0 versions. For a more recent guide pertaining to the latest versions, please see the following article:
To create a custom site, open the Management Console and from the Site Tab right-click and select New Site.
Once the Custom Site is created, check the option "Enabled", check the option "Allow unknown devices to authenticate" and simply set the target folder to the desired one.
For more info about silent command and redirection please search for TK-KB4, click ThinKiosk Silent Installation or alternatively use the Step-by-Step installation guide.