Implementing denominator style for time signature

[van Silfhout, Ruud]

Hi,

As I picked up a project to create a hymne book using lilypond for a church in 
Eindhoven, I need some features which are not yet available from lilypond as it 
is now (I picked up a 2.1.0 version some weeks ago).  
As a newbie in lilypond devlopment, I tried to implement the denominator style 
for a time signature where it is possible to display a note as a denominator. I 
have two questions:
1. I changed the code such that  the denominator style is recognized, but I 
need some C++ code on how to create a note.
2. I read in the header of the code that it can be replaced by markup code, but 
I have no idea on how to do that. If that is the way to continue, can somebody 
help me to implement it that way.

Bye,
Ruud van Silfhout