Noteworthy composer to lilypond

[Jon Cox]

Hello, I am a rank amateur at Lilypond, but love the way it engraves the 
music.  I use noteworthy composer as my "writing" software.  I am capable of 
bringing each staff independently into lilypond code.  How can I tell lilypond 
that this part is the treble clef of the system and this part is the bass clef 
of the system, and make the system print like it should.  I am sure this is 
somewhere in the documentation, but I am too overwhelmed to find it.  

Really appreciate your help

Jon