A question, I was trying to alte Mira's clothes to be fully upgradeable, what controls this?
 a_light_x09.uti (Mira's Ballistic Mesh Jacket) 
 Found in BIF's/templates.bif/Blueprint, Item/ 
 General Tab: Upgrade Level, set it higher than 0 to make it upgradeable. 
 For seeing what the upgrade numbers mean, check out the bottom part of this Tutorial (
http://64.20.36.211/showthread.php?t=144452). Just set that upgrade level then save it to your override, then you will likely need a save from before Mira joins your party, or you will need to use cheats to spawn a new one. 
 I hope this helps! :D 
 PS: Atton's Jacket is a_light_x02.uti...