How To Bind Keys?

[imported_Omega Blue]

i have had no problem with Painkiller, i got it quick from ebgames with the free t-shirt, installed with no problem and played fine, i beat it but now im wondering how do you bind keys? i want to bind the "pkhaste" command and i am wondering if this is possible in Painkiller for SP? if so how do i go by doing this?