O.K. I am running Vegas 5. When trying to render or burn directly from Vegas it won't let me unless I register the Sony Main Concept MPEG 1-2 Pro Plug In. I have tryed several times and it does not seem to reckognize my system. Reached Sony Tech Support, ofcourse, no luck, they keep dragging me around the subject. Does anyone know if I can use another plug In MPEG 1-2 that will be compatable with Vegas? A good codec for XP and Vegas? Thanks everyone.