The above site search tool is the one provided with Microsoft FrontPage.  Your server must be configured properly with FrontPage extensions in order for it to work, and you can not control the output nor the pages searched.  If you are serious about an excellent site search for your web, we recommend the MySearch product sold through Thomas Brunt's OutFront.net:

MySearch For Sites Hosted on Windows NT or Windows 2000.

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Features

The links to returned records are named by the Title of the page. If no title is present, the file name will be used.

You have the option of adding a description to the page. This description is not shown by web browsers (view source will show it) by will be listed in the returned results beneath the file Title. If you have a content rich site, this allows the user to get a more detailed idea of the page other than the search results.

The search can either be limited to one (1) folder or the entire site. Sub folders and sub webs will searched.

The search initially places the web contents in an Access2000 database. Folders that begin with an underscore "_" will not be included. If you wish to hide files from the search, they must be places in a folder that begins with "_".

SQL server can be used with minimal changes.