Here is an example of how I do it, even though it's very messy looking. However, I'm aiming for the end result midi file and not the publication of the score.
This will get you the same MIDI output with less mess:!NoteWorthyComposerClip(2.0,Single)
|Chord|Dur:8th|Pos:2,4^|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:3|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:2,4|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:0,4|Opts:Stem=Down,Beam=End
|Note|Dur:8th|Pos:3|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:4|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-4^,n5|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-4,7|Opts:Stem=Down,Beam=End
|Bar
|Chord|Dur:8th|Pos:-1,6^|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:0|Opts:Stem=Down,Beam
|Note|Dur:8th|Pos:-1|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-2,6|Opts:Stem=Down,Beam=End
|Chord|Dur:8th|Pos:-3,6^|Opts:Stem=Down,Beam=First
|Note|Dur:8th|Pos:-4|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-5,6|Opts:Stem=Down,Beam
|Chord|Dur:8th|Pos:-4,5|Opts:Stem=Down,Beam=End
!NoteWorthyComposerClip-End