S.T.A.L.K.E.R.: Shadow of Chernobyl
I just have to keep on pressing NUM 6 while going out of trade and going back in.
I have never heard a sound when I pressed the bindings, and I have tried pressing NUM 6 once before entering trade, and exiting trade. It seems that the only reliable way that I can get it to work is to press the binding multiple times before exiting the trade window.
I will see if I can get any other functions to work. Does the key bindings work as a toggle (wasn't really specified in the readme)?