custom articulation inside custom drumstaff

[luis jure]

hello list, i have yet another question regarding the definition of a
custom drumstaff, and it is how to add a custom articulation.

it's actually two questions, the first one is how to make custom
articulations available inside #define mydrums(). 

i managed to do that adding a custom articulation in script.scm, but
somehow i fail to see how to put the definition in a separate file that i
could include (script.scm will be rewritten every time i install lilypond)

the second question later, if i manage to solve this...



best,


lj