The SAP NetWeaver is a comprehensive technology platform. It provides different functionalities, from Application server, throughout Business intelligence and Portal to eXchange infrastructure. Depending on your business requirement, you can choose one or many of these functionalities to install. They are grouped in so-called usage types, like AS-Java for Java application server, EP for enterprise portal, PI/XI for process integration and exchange infrastructure. Up to now, it was only possible to install a system with certain usage types along with the underlying Java application server. There is no way to install additional usage types onto an existing Java system. But this is often demanded. For instance, if you upgrade your system from the NetWeaver 04 release, the functionalities used in the source release will be upgraded. You can’t extend the upgraded system with additional functionalities that come with the new release. This is of course unsatisfactory. The Support Package Stack 12 of NetWeaver 2004s which was released few days ago comes with a version of the Java Support Package Manager (JSPM), which provides the possibility of installing additional usage types to an existing Java system. It is able to verify the application dependencies and preprequisites for the usage types to be installed. We prepared a screencam demo, that demonstrates and explains the installation procedure using JSPM in great detail.