In the cinefacts.de forum about “Kinowelt Home Entertainment” (they publish the roswell dvd boxes in Germany) the fans discussed the dvd publication in Germany. There, the question about replaced songs came up because they were changed in the US and UK box.
Today the moderator of that board wrote an answer. He tells, that they used the audio of the tv version which aired in Germany. That would mean that the song from the tv version are on the dvd!