I mean comment the line so that it won't be run

put 'rem' at the beginning of the line, like this ->
rem keyb uk,, c:\windows\command\keyboard.sys
You obviously have the codepage prepared and stuff?
I remember when I wanted to have finnish keyboard layout I needed to make lines like this->
mode con codepage prepare=((850) c:\dos\ega.cpi)
mode con codepage select=850
-M