S.T.A.L.K.E.R. - Call of Chernobyl\gamedata\configs\ui\textures_descr\ui_actor_portrets.xml
Texture descriptions are just aliases for x,y,w,h coordinates on a specific texture. Fastest way to find coordinate for a specific name would be to use gimp and set grid width to 123 and height to 87 and show grid.
"I have a dream that one day this community will rise up and live out the true meaning of its creed: "We hold these truths to be self-evident; that all mods are created equal."