I have uploaded a "second edition" to make the score more readable, adding a keyboard reduction and stipulating optional instrumental doubling (in recognition of the fact that this is in no way an easy set of pieces).
The sections with triangle noteheads are "trio" sections, where the instruments should either drop out or change in some way to highlight the section change. I initially stipulated that these sections should be lighter, but depending on the setting a music director may decide to the opposite if it is deemed effective.
I leave the original version because that will those always be the "correct" choice of accidentals in my mind. Dwscores 01:59, 27 February 2012 (UTC)