Hi, the author of PvaStrumento said that PVA doesnt generates valid program streams. You'll have to use PVAstrumento only for demuxing. Try a simple program like ifoedit 0.95. Its very fast and you'll have in now time a working dvd. To guide you , choose Auhtor DVD in the ifoeedit menu, select your video and audio source which you have demuxed using PVAstrumento and then press start. Burn the created files with Nero or anyother burning software that is capable of burning DVD video. For your information, TerraForce1