Solved
You can do this by customizing the view. See: http://support.ptc.com/help/windchill/wnc/r11.1_m020/whc_en/index.html#page/Windchill_Help_Center/UserSetupTableViewNew.html
Basically: Views -> Manage Structure Views
From there, you can either edit the current view, or do a save as on a current view, then add the additional columns you want.
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