"bricho" is czech for "stomach, abdomen"
it's also a "named selection" responsible for the animation
of that particular bodypart (and everything connected to it).
to add your pources to "bricho":
- highlight "bricho" in the "Named selections" window
(this will highlight in red all the points belonging to it)
- keep pressing "Ctrl" and select your pources.
- once you added your stuff to the original selection, right
click on the name of the selection and choose "Redefine"
from the pop-up menu to redefine "bricho".
I think that's the way it's done. If i'm wrong, i'm terribly
sorry for misleading you..