I just DL'ed a movie off Grokster. I currently use NERO burning software. I attempted to burn the movie onto a DVD disc. I got an error message that MPEG2 codec was missing. I got that one. However when I tried to burn the movie I got warnings that errors were present? I selected ignore, and burned the disc. I tried to play it in my DVD Home theater but it would not read/play. I put the disc into my computer dvd player and it worked. Why is that? And how do I make "hard copies" of movies that one downloads?