Very useful guide, great stuff!
Little correction for this:
"You can use 's1s0' to reset sustain (end the notes currently being sustained and then start sustaining all further notes)"
I think you mean 's0s1' to produce that insta pedal up and back down effect.
Also, I don't believe sustain works on every instrument in MS2. They'll play the piece but sustain is only noticeable on piano/electric piano, harpsichord, pick bass guitar, elec guitar (really strongly), Harmonica (really strongly), bass, violin (really strongly), celesta (somewhat), Cello (really strongly), trombone (really strongly), and acoustic bass.