In a *.nwc song file, there must be the same number of staves throughout the entire song. For example, if you want to print a song with 3 staves, then  2 staves, and then 3 staves at the end, this is not possible in one song file. However, to print a song that has varying number of staves in the song, there is a work around:

• Create each group of staves in different *.nwc song file (Ex: song file for 3 staves, song file for 2 staves, song file for 3 staves)
  
• Use File: Print Preview Copy to copy the first section (first *.nwc song file)
  
• Paste (Ctrl+V) into another application like a word processor
  
• Use File: Print Preview Copy to copy the next section (next *.nwc song file)
  
• Paste (Ctrl+V) into other application after the first section
  
• Repeat as many times as needed
  

This is a work around and will take some trial and error to get the look you want. It will not be perfect, as there will be final bar lines in the middle of the song print, etc. You will not want to print the Title Info (File: Page Setup, Options) and will need to decrease the margins and staff size (ex: margins - 2,2,2,5 and staff size -12).

You can also use this procedure to print one song after another.