I would love to be able to re-map the A and E keys you find in the barter and search containers menus(Take All, Exit). I know it's possible because I've done it before as per some instructions given to me from a source I can no longer remember! Does anyone know where I have to go in the New Vegas install folder to make the adjustments, and what the entries are?

on 360 its Pause -> Settings -> Controls -> Action Mapping

is that not available on PC?