historical key signatures ?

[anders stenberg]

Hello!

Need some help with the following:
Im working on a diplomatic edition of  some renaisance music:  putting 
the orginal parts in score with orginal clefs, time signatures 
noteshapes etc.
As I' d like to as far as possible retain the "feel and look" of the 
orginal parts i wonder:

Is ther a  way  to  get "historical keysignatures" ie. the doubling of 
the b-flat signs when the clef (par ex. mezzosoprano- clef) allows two 
different b- flats inside staff.  (Changing the Grobe for flats is not 
the problem: That  I did get figured out on my own.)

I'm working on Lilypond 2.7.24 (Windows native) through  jEdit.

If anybody can sugest a workable solution to this would be nice. As I 
am  a novise in programing  I fear construkting a Scheme snipp on my own 
is beyond my capabilities so if any body can give me a working snipp/ 
point me to one (did try to look in the documentation but i'm not good 
enough at looking/ lazy/ just plain stupid (( chose the apropriate 
alternative.))

yours Anders Stenberg