Im not Cathe, but there's no transcript or tutorial that I'm aware of. You might try learning it in segments, like do the warmup, segment one and repeat it as long as you want to workout before the cooldown. Next time do this with segment two. Next time combine one and two. Etc.
Another option is to use Cathe's older step workouts first, like the Classics or Hits where she moves a little slower or breaks her signature moves down a bit more. Basic Step & Body Fusion and the Intermediate Low Impact step dvds also move slower and have more breakdown of her moves. Step Moves kind of expects you know her choreography more.