The Local Installation Source Tool is a wizard to help manage your Local Installation Source (LIS) on computers running Microsoft Office 2003. The LIS Tool allows you to enable or disable LIS, and to move the MsoCache folder to a new volume. Office 2003 Tool: Local Installation Source Tool is intended for use by customers and network administrators with LIS issues who contact Microsoft Product Support Services. Local Installation Source is a Setup feature. When a user installs Microsoft Office 2003 from a CD or a compressed CD image on the network, Setup copies any required installation files to a hidden folder on the local computer. Users can install features on demand or run Setup in maintenance mode to add new features without their original media. This version is the first release on CNET Download.com.