Innotek VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software. Some of the features of VirtualBox are: Modularity, virtual machine descriptions in XML, guest additions for Windows and Linux and shared folders. The following workshop describes how to install VirtualBox (OSE) on OpenSuse 10.3 and to install a WindowsXP guest addition.