Ontolica Aggregate Center is created like any other SharePoint site. Activating the Ontolica Search feature at the site collection level makes the Ontolica Aggregate Center site template available for that site collection. To create an Ontolica Aggregate Center, please go to the root site of the site collection. Then click Site Actions and select New Site or More Options. On the Create window locate the Ontolica Aggregate Center. If the template is not available in the list of templates, please make sure that the Ontolica Search feature is enabled as described above and an appropriate SharePoint language pack is installed according to the list of languages supported by Ontolica.
Please note that an Ontolica Aggregate Center can be created without having a valid license that supports this product. But you will be able to use the center only after obtaining a valid license that supports the Ontolica Aggregate and setting it as active in the Central Administration > General Application Settings > Manage Ontolica licenses.