Recently launched software from Fortium is designed to protect DVD-R copies which carry your valuable screeners and audition copies. Much of the 'leakage' of illegally copied content, which can turn up on television channels worldwide, has been shown to come from festival and awards DVD entries which have not been copy-protected.  Fortium's Patronus copy protection system is one of the newer systems which protects against mass market PC and Mac-based ripping software while sustaining playback on DVD-R players see full details at:  http://www.fortiumtech.com/
A London-based facilities company which will duplicate and copy protect using the  Petronus system is TCSoho see their contact details at:  http://tcsoho.tv/site/