Are you sure you installed it correctly?
Since Defiant (author of KM) wrote a scrolling mutator list once, so it would have been included.
Actually, if I remember correctly, KM1.0 came with an UMM (Unified MainMenu) version, and all of them have scrolling mutators (or rather, scrolling menu's).
If you have such a black screen (but still playing) try opening the map mode.