Notenames

[Phil Holmes]

> I'm not top posting.

I've tried sending this from 2 different email addresses without success, 
so now trying Gmane.

Does anyone know how to get notenames under the relevant stave (in fact, I 
want them stacked vertically above each other, but under a stave would do) 
rather than in a horizontal line?  I think this illustrates my issue:

\score {
\new StaffGroup
<<
\new Staff << c''1 \context NoteNames c''1 >>
\new Staff << a'1 \context NoteNames a'1 >>
>>
}
\score {
<<
\new Staff << c''1 \context NoteNames c''1 >>
\new Staff << a'1 \context NoteNames a'1 >>
>>
}