In accordance with certain aspects of the present invention, enhancements have been developed to further extend the performance of a generic DVD navigator component. Here, the DVD navigator program has been enhanced to better synchronize with DVD player applications. As such, better control mechanisms for the player application are provided. For example, improved enforcement of restricted/parental controlled content viewing, generation and assignment of unique identifiers to the content source, and an improved user and player application environment for starting and stopping playback are provided.