Cant map backslash "\" key in game

It's possible that you guys - or someone else who stumbles upon this - may be "doing it wrong" and need to move your fingers one column to the left. At least that's what the problem was in "a friend's" case. *cough*  ;-) I expect the reason why there isn't a flood of complaints like this from UK gamers is because, for most people with a UK keyboard, being unable to map backslash isn't a big issue if your hand is in the normal position.

That said, it would absolutely be useful to be able to map backslash on UK keyboards since it's a very easily accessible key!