Movie mini-OST "Cowgirl Ed" was released in 2001 as bonus material with the Knockin' on Heaven's Door soundtrack. Composed and arranged by Yoko Kanno and performed by The Seatbelts, this six-track collection focuses on Ed and Faye's musical themes. The tracks blend electronic chaos for Ed's hacking sequences with more sophisticated, melancholic compositions reflecting Faye's emotional journey. Never sold separately, this mini-album remains a rare collector's item capturing the female crew members' distinct musical identities.