Specifying piece titles in Score context

[Michael Seifert]

        I’m trying to compile some parts and a full score from a set of 
included files.   I’m running into a problem that I’m sure must be solvable;  I 
just can’t figure out where it is in the documentation.

        Specifically:  many of the parts include several bars of rest, so I 
need to have skipBars = ##t in all my scores.  So I can do something like this:
—————
\version "2.18.2"

\header {
title = "Symphony"
}

\new Score
{
\set Score.skipBars = ##t

\relative c' { \repeat unfold 2 {c4 d e f} R1*10 \repeat unfold 2 {c4 d e f}}

% \header { piece = "I."}
}

\new Score
{
\set Score.skipBars = ##t

\relative c' { \repeat unfold 2 {f4 e d c} R1*10 \repeat unfold 2 {f4 e d c}}

% \header { piece = "II."}
}
—————
        But if I do this, I can’t figure out how to include the 
movement-specific headers;  uncommenting the commented lines in the snippet 
above returns an error about an “unexpected \header”.

        As far as I can tell, all of the examples in the documentation 
involving multiple scores with different titles use the \score { … } construct 
instead of the \new Score { … } construct.  If I do that, I can get multiple 
pieces with headers, but I can’t change the skipBars property;  uncommenting 
the commented lines in the snippet below also throws an error concerning 
“unexpected MUSIC_FUNCTION”:
————— 
\version "2.18.2"

\header {
title = "Symphony"
}

\score
{
%\set Score.skipBars = ##t

\relative c' { \repeat unfold 2 {c4 d e f} R1*10 \repeat unfold 2 {c4 d e f}}

\header { piece = "I."}
}

\score
{
% \set Score.skipBars = ##t

\relative c' { \repeat unfold 2 {f4 e d c} R1*10 \repeat unfold 2 {f4 e d c}}

\header { piece = "II."}
}
————
How do I get parts including multiple scores *and* with condensed multi-rests 
in each one?  

Mike Seifert
New London, CT