I'm working on a show with drumset and I find myself desiring to notate cross-stick snare drum. It would be nice to have this sound available, as it provides a unique groove sound to drumset.

Aha, ";rim knock";, got it. That's what I was looking for.

By cross-stick, do you mean the type of technique where LH (for example) has one end on the head, and the other end clicking the rim (ala bossa nova)? If so, that's already in there (defined as ";rim knock";).

Or do you mean something else like one stick playing against the other stick?