lyrics in polyphony

[Charles Gran]

I am writing a song in lead-sheet format.  I have an introduction that 
is polyphonic (manual 2.16).  The last measure of the introduction has a 
pickup into the melody proper.  I can't get a lyric on that pick-up.

In single-staff polyphony, how can you treat the top line as melody with 
lyric and the bottom as accompaniment?  My piece uses a template from 
the manual (notes, lyrics, and chords 3.2.4)

Charles