Installation of new component via an Update Site relies on the mechanisms provided by the Eclipse platform :

1. In Papyrus menu, choose :"Help"/"SoftwareUpdates"/"Find and Install"
2. Select "Search for new feature to install" and go next.
3. Click the "New remote site" button.
4. In the new popup window, enter the address of the update site.
5. Validate and proceed next to choose the new features to install.
6. At the end, restart eclipse when you are asked for.

Installation of new features via an archived Update Site is pretty close to the installation vi a remote update site, only the kind of source for installation is different :

1. In Papyrus menu, choose :"Help"/"SoftwareUpdates"/"Find and Install"
2. Select "Search for new feature to install" and go next.
3. Click the "New archived site" button.
4. In the new popup window, enter the address of the update site.
5. Validate and proceed next to choose the new features to install.
6. At the end, restart eclipse when you are asked for.