@Ferret: Glad you like it!

I just started taking organ lessons a month ago, so I only have a basic understanding of stops and registration.
Measures 1-19: A full, cheerful sound. Bordun16+Rohrflote8+Gedeckt4+Spitzflote2? 16+8ft pedal stops will work throughout the piece I think. 20-41: something more melancholy, perhaps a 16' oboe? Accompany that with the left hand using the Rohrflote8.
41-55: Use the same stops you used in 1-19. 56-70: I don't care, just make it dark and creepy. 70-79: Do something silly

79-85: Throw in the kitchen sink and a Bombarde and that should do it! 86-End: Same as 1-19 with something extra on the last five bars.
If none of that makes sense, don't worry, I didn't understand it either. I think the mp3 gives a good basis for registration but play around and do want you want with it!
@Goodridge: "Splendid" is a word I like

I agree that around 55 it loses direction and a fair amount of steam.
Regardless, I'm very pleased you both enjoyed it so much. Once I put the scores in order I'll be posting a few more pieces soon.
Justin