yes just kidding
I think Volcano "Garozzo" retired player from zEx 3D COL etc... used a different kind of keys but i dont remember if he used to use C to crouch
I use to "C" to "jumpthrow" rofl
V= buy push HE
F = buy/push Molotov/inc
Middlebutton (not scroll) = push flashbang
T= inspect weapon
Scroll down = jump
Scroll up = select weapon
And I did some binds to buy weapons and change size of the crosshairs in the arrows and in the other keys away from my "WASD"
But if you used to crouch if C and are trying to change, just bind CTRL and C together and you if you cannot familiarize with one of the keys just unbind.
I jump with SPACE and Scroll Down since of 1.6
Space rarely use to jump but if I unbind it I got crazy........