Multi-voice grace note work-around? Also abc2ly questions

[Joyce Wilson]

I saw in the archives that there is some way to work around the problem 
with the extra barline being created after a grace note in multi-part 
music, but I need a bit more explanation to be able to do it 
successfully, since my attempts so far have just made the grace note 
disappear.  An example would be most welcome.

On the abc2ly topic, I have a couple of questions.  I'm finding that 
when I run abc through abc2ly, I don't just have to go through and add 
in whatever extra notation I'm using Lilypond for (measure numbers, 
breath marks, note accents, text markup like 'D.C. al Fine', and 
cautionary accidentals like '(#)' -- if it's possible to do this stuff 
in abc, please tell me and I'll quit bothering the list! :> ).  I also 
have to make a lot of fixes of things which worked fine in abc.  A 
multipart piece with a time signature change in the middle proved 
especially problematic (In lilypond, the top line started in 4/4 and 
switched to 2/4, but the other three lines started out in 2/4, even 
after I edited the abc to explicitly specify the starting time sig for 
each part as 4/4)-- I ended up having to convert each part individually, 
and then reassemble the resulting snippets of lily code.  I guess my 
general question is: are there any tips for writing especially 
abc2ly-friendly abc?

What determines where the line-breaks are in the output from abc2ly? 
They seem to be rather random, which makes it difficult for me to find 
my way around to do editing.  My current (laborious) approach is to go 
through the converted lilypond code and insert line breaks before each 
"\bar" and then tidy it up so that exactly one measure is on each line. 
 Then I can at least navigate by counting measures.  Is there some way 
to get abc2ly to do this for me?

Graham, thanks for directing me to the lilypond templates-- that did 
indeed allow me to get StaffGroup working the way I wanted.

Pip-pip,
Joyce