I don't have the dover edition, but I'm assuming i know what passagework you're referring to. I have played the 3rd Kapustin etude, 2nd chopin scherzo, among others. I've already got the 1st 5 pages memorzied, although certainly not at performance level. Ronde, I'd be very interested in hearing you play it. Do you have a recording.
One interesting thing that I've found with this piece, is although it looks nasty on paper, it fits remarkably nice under the fingers. Will I ever be able to play it like Hamelin - NO, however I believe an advanced amature could reasonably learn this piece for his/her own enjoyment.