1 - Choose the Search for new features to install and click on the Next button.
2 - In the next dialog box, choose the button New Remote Site.

3 - Type Soyatec Update Manager Site in the name field and the appropriate update site in the URL field:
http://www.soyatec.com/update to install eUML2 for Callisto
http://www.soyatec.com/update/europa to install eUML2 for Europa

4 - Select the Callisto or Europa Discovery Site, Soyatec Update Manager Site and click on Finish button
In the coming dialog, expand the tree view of Callisto Discovery
Site in the feature
list, check the option eUML2 free edition and the Select Required
button if there is error message about the plugin missing.
If the tree view of Callisto Discovery Site isn't expanded, the Eclipse Update manager cannot resolve the dependencies.