NZFF

I've recently downloaded and installed this aircraft from avsim (os744v4_anz) and whilst it's a great looking model it is very unresponsive on the ground, even at full nosewheel lock and rudder and slow speeds it is almost impossible to steer, even differential brakes don't help. What do I change in the aircraft.cfg to make the beast taxi correctly??

Was raised here so you are not alone.
Think it's unfortunately in the .air file and not readily accessible.