Don't apply any highlighter to the middle of your nose, I see women do this all the time and I don't think they realize it just makes that bump (and the prominence of length to their nose) more visible. Instead apply a darker shade with no warm tones from your tip down blending in very well, this will give the illusion of shortening the nose. Using your contour very lightly (very very) go slightly beyond the natural sides of your nose to attempt to make the bump less visible (think of it like drawing on a corset to squeeze your nose in (yes this is all very bizarre terminology)). While it will help slightly it's not magic and your profile will still probably tell the tale.