This document illustrates the steps necessary to build a dual-boot Linux / Windows HPC Server 2008 solution. Although it is intended for use on HPC clusters, the techniques illustrated are applicable with little modification to deployment systems based on Windows Deployment Services, which is used in HPC Server 2008. The procedure can be summarized in: 1. Verify the existing Linux disk layout.2. If necessary, modify the existing Linux partitions to free space for Windows installation.3. Install Windows.4. Set the active boot partition so that the desired o/s is started at the next reboot. It is recommended to read the dual-boot whitepaper covering Compute Cluster Server 2003. Deployment of Windows HPC Server 2008 differs significantly, so not all the techniques illustrated there are still applicable. The concepts, however, are similar.