unmetered music question

[Thomas Ruedas]

Hi,
I am trying to set a piece where no meter is given, but don't quite 
succeed. What I have done is to omit the \time x/y command, but lily 
insists on having a 4/4 meter. Furthermore, I tried to follow the 
instruction from doc sect. 5.3.7 "Unmetered music" by setting
  \score {
    <<
     \set Score.timing = ##f
     \context Voice = fl { \FluteOne }
     \context PianoStaff <<
         \context Staff = upper \UpperOne
         \context Staff = lower \LowerOne
         >>
     >>
}
and inserting bars by hand in the text for visual division of the music, 
but lily sets the bars for her 4/4 an addition to those.
Is it possible to set unmetered music the way I want with v.2.4.6, and how 
do I do it?
Thanks,
Thomas
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