To be honest, I haven't listened to the mp3, but looking at the score, the pedal part in question (starting at measure 60) is actually rather elementary. Any organist should have relative ease working out the passage, and it would be rather fun to play it.
have you thought about a Baroque style harpsichord suite, but for organ? Maybe in this order
Prelude
Chaconne
Toccata
Fugue
Postlude
just recommendations, nothing binding
Godspeed on your composition