Questions about fear.

[Cheezeninja]

I was wondering if anyone knows the exact mechanics of how fear works. I understand it to have an effect on the units morale check, but thats about the extent of my knowledge. Does the fear inducing unit have to actually do the damage to apply the modifier? Would a fear inducing unit with a bow result in the same check as a unit with fear in close combat? Do passive spell's that cause damage (fire shield) also get the fear bonus? Would it be possible to tweak a unit so far that any wound they inflicted caused auto-routing, or nearly so? (Say a wished up PoD with the Fear causing HoF ability and maxed out fear gear...possible but highly unlikely).