Download the Design Management package from Design Management on Jazz.net. On the All Downloads page, select IBM Rational® Rhapsody® Design Manager - All (Rhapsody-DM-All.zip)
Follow the instructions outlined in the Rational Rhapsody Design Manager information center install guide: Installing and configuring Design Management
Once you have installed the server, follow the instructions for setting up the database, noting that only Derby, DB2® and Oracle are supported in the Rational solution for systems and software engineering, and configuring the server using the custom set-up.
When the installation and configuration is complete, it is strongly recommended that you read the Design Management integrations section of the Design Management information center to understand how the Design Management server integrates with other products on the Jazz Team Server as well as Rational DOORS®. The actual integration steps are described in Configuring friending and OSLC consumers.