This is a great tutorial that explains how to manage MIDI messages if you run into them.  This can usually be an issue when importing MIDI into Sibelius.  If the MIDI file has any automation saved with the MIDI file, they will import with the MIDI file leaving MIDI message text all over your score.  This video explains how to remove these easily.  Stay tuned til the end as well as we explain how to change your import MIDI settings so they do not import to begin with!