DayZ key binding woes leaving me feeling all sad :(

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Binding the left mouse button to opening doors and picking up loot is so SUPER handy! No more F needed. 10 out of 10 going through towns, looting. Why didn't the developers think of this? But this potentially revolutionary key binding improvement is foiled when sprinting from zombies and trying to open a door, making my character power punch mentioned door instead. The inability to rebind this sprinting powerpunch behavior is the ONLY thing preventing me from using left mouse button as a viab...