ive found something quite interesting concerning revans mask that could be put into Bos:Sr, the mandalorians envading of Cathar
this could be a cutscence or somethin like that
warning: major spoilers!
apparently revan got his mask from a mandalorian female under Cassus Fett
who killed her when she wanted the Cathars to be spared, saying they are already defeated, when revan went to cathar for the 2nd time he found the mandalorian female's mask, put it on and vowed he wouldn't take it off untill all the mandalorians were defeated.
the link is this http://starwars.wikia.com/wiki/Revan
and to the above did u add anything else to the override after installing Bos:Sr?