The Sitefinity Module builder allows you to create custom types on the fly for use as custom modules. In the 5.0 release back in February, a two new field types were added to the module builder: Guid and Array of Guids. These allow you to “link” content items using their Id properties, adding support of one-to-many and many-to-many relationships between your content.
One of the best features of Sitefinity is the inclusion of the fantastic ORM tool OpenAccess. However, one issue that can be a bit troublesome is the fact that Sitefinity has often shipped with a different version of OpenAccess that the latest.
Fortunately, It is possible to work around this problem, with a little help from the OpenAccess product archive and an MSI extractor.