You can create server name mappings to override how Microsoft Office SharePoint Portal Server 2003 displays search results or how users access content after you create a content index.
You can use a server mapping to circumvent problems caused by referring to a local drive. For example, if you use a local address such as file://C:/Documents in the portal site to direct users to a document, access problems may occur. However, if you create a server name mapping to map the local address to an http:// protocol or to any other protocol, no access problems occur. A server name mapping matches all URLs that conform to a general expression (such as file://) and replaces the matched expression with another expression (such as http://).