alpp,
That's not the Rachmaninov transcription. I know about 4 or 5 different transcriptions of the Flight of the Bumblebee, with varying degrees of difficulty. As for the fingering, I could send you mine, if/when I have time. As for the pp leggiero part Dazzer posted, I have allways used 32121432-32121234 and then 14321432. Try that, If it works for me, maybe it'll work for you, too.