I want ledger lines in middle of staff, or dashed staff lines

[Kevin Dalley]

I want to introduce ledger lines in the middle of a staff which has
some missing lines.  Alternatively, I could using dashed or dotted
lines in these locations.

I'm working on chromatic staffs, using 6-6 Tetragram by Richard
Parncutt as a starting point.  
http://web.syr.edu/~pwmorris/mnma/gallery/4LineNotations.html


I want to place a ledger lines between the groups of 4-line staffs, as
in the images above.  Alternatively, these ledger lines could be
replaced with dashed or dotted lines and look otherwise like a
standard staff line.  Does anyone have ideas on how to do this?

My chromatic staff is still simple, but moving forward.  My current
chromatic staff output is here:

http://www.kelphead.org/chromatic/