"community compose" with lilypond

[lilypond]

I would like to "compose" with the community with Lilypond.

Problem :
I play Djembé, a instrument without music notation. I would like to  
write using Lilypond notation. But this notation can be wrong of  
course. No one knows Djembé classical music notation, so no one can  
say it is Ok, or wrong. I would like to check the Lilypond notation by  
playing its midi with a Djembé soundfont.

Djembé players can hear if the sound is not good, so the notation has  
to be altered. I would like to use a wiki for that with the LilyPond  
extension. So anyone can make a (small) change and hear the  
difference. See f.e http://www.oscarvandillen.com/Lilypond

Can a custom soundfont be attached to the <lilymidi> ? So the sound,  
and thus the noation, can be checked? I would be a kind of "composing"  
or more writing Lilypond with the community.

If that is possible then the small Djembé community can start saving  
original African Djembé music. So it will not be lost.