Well, I managed to get the thing to show a bracketed piano staff with an alto-clef staff above it, but I can’t get the alto-clef staff to say “Viola” next to it. (Update: Got it!) I suppose it’s somewhat obvious what with the weirdo clef that it’s viola, but I’d rather it said so. A violin could play it as well, but I’ll make them work for it. Suuuuure, it can be played on a violin! Can ya read alto clef? Heh.
At any rate, it will work nicely. Now, I can start to Lilypond-ize “Mormorio.” I still can’t believe I’m working through the thing! It’s so beautiful.