When you configure a wizard to create meta-projects, the Data Providers step of the wizard displays a screen that allows you to pick specific versions of existing projects to build a meta project.

The project selection screen for meta-projects

Type the name of a project to add it to your selection, and specify the version to include in your meta-project. There are no other configuration options available, the versions of the selected projects will be grouped in a new project, which will be rated as any other project in this model.