I'm currently writing some pit parts for a marching show.  I have Sib. 3 and VD.  I want to set up one staff for each front ensemble member.  Obviously they will all have a primary instrument (usually a keyboard), but I want to also have other parts written in (sus. cymbal, crotales, and other accessories).  Is it possible to have multiple instruments written on the same staff as the primary keyboard parts?  If so, how do I set it up?