how do i disable the arrow keys from controlling the nose wheel?!

hi all, while going through FS2crew's (level-d 767) control checks, i don't want the plane turning.. as in under the influence of the left and right arrow keys.. as we all know, both the rudder keys and the left an right turn (arrow) keys control the planes nose gear steering in fs9.. how do i disable the arrow keys from controlling the nose gear steering and leave the job for just the rudder controls to handle??