First you need a license and a S-user with download authorization.
When there is a contract for RWD uPerform, also called SAP Productivity Pak, you will find a download on http://service.sap.com/swdc.
1. Open http://service.sap.com/swdc
2. On this page, klick: ''Browse the navigation area''
3. On the menu on the left, select: ''Entry by application group''
4. On this page, select in the right column: ''SAP Education Products''
5. All RWD products, eg "SAP PRODUCTIVITY PAK BY RWD", which you are entitled to, will be shown
You must apply for a Permanent License Key by following the fulfillment process, see note 1131270.