I've not used Sib for percussion so have no direct experience - but I've just spent the last 20mins or so reading the Sib7 reference guide.
The conclusion of which is that apparently Sib7 a) will notate drum/percussion and b) if mapped to midi device's drum map, Sib7 will notate correctly as percussion - eg you want hi-hat notated, it will sound as a hi-hat and will have a cross-head when notated.
What the manual also states is:
Hope this helps - if you want the manual you can get it here: http://www.sibelius.com/download/docume ... index.htmlThe Drum Set and Drum Kit instruments use a notational system based on the recommendations
of the Percussive Arts Society (in Norman Weinberg’s book, Guide To Standardized Drumset
Notation)

