file associations on Lilypond/Cygwin

[Aurèle]

Hi,

I work with lilypond on winXP for two years (and I am very happy with it)
Each time I install an new version of lilypond (thanks to Bert for his 
packages),
my files associations (with XEmacs on Cygwin) are changed to the 
unpracticable 'Edit Source with Notepad'.
I know that windows' users aren't often hackers, but someone who try to 
use lilypond is probably able to associate an extension with his or her 
text editor.
Is there a way to avoid cygwin reinstallation to change file associations ?

Whishes,

Aurèle Duda
www.musiquefrancaise.asso.fr