Microsoft Knowledge Base Article 300483 contains the following summary:

With Remote Installation Services, you can set up new client computers remotely by using a Remote Installation Services (RIS) network shared folder as the source of the Windows 2000 Professional files. You can install operating systems on remote boot-enabled client computers by connecting the computer to the network, starting the client computer, booting off a PXE ROM or Remote Boot Disk, and logging on with a valid user account. This document outlines the steps necessary to install, configure, and use Remote Installation Services (RIS).