Probably the most common scenario we see the CDT used today is where project teams integrate it into an existing code base. These code bases are often large and mainly unstructured. As a test environment the CDT development team uses large open source projects such as Mozilla and Open Office to help ensure the CDT is flexible and scalable enough to handle large legacy projects. This talk walks through some of the challenges the CDT faces when applied to such projects and gives tips on how to set up the CDT to overcome these challenges.