No problem at all mskhan. Open the aircraft.cfg file in notepad (or any other ASCI editor) and look for
[contact_points]
point.0=1, 40.85, 0.00, -10.20, 1600, 0, 1.442, 55.92, 0.6, 2.5, 0.9, 4.0, 4.0, 0, 220.0, 250.0
point.1=1, -11.85, -9.38, -10.80, 1600, 1, 1.442, 0.00, 1.0, 2.5, 0.9, 6.9, 6.9, 2, 220.0, 250.0
point.2=1, -11.55, 9.38, -10.80, 1600, 2, 1.442, 0.00, 1.0, 2.5, 0.9, 7.1, 7.1, 3, 220.0, 250.0
the above example is part of the FSX Boeing 737 cfg file.
You want to find the nose gear, which in this case is point.0
You can tell it is the nose gear because it is on the centerline:
point.0=1, 40.85, 0.00, -10.20, 1600, 0, 1.442, 55.92, 0.6, 2.5, 0.9, 4.0, 4.0, 0, 220.0, 250.0
the seventh entry is the steering angle in degrees:
point.0=1, 40.85, 0.00, -10.20, 1600, 0, 1.442, 55.92, 0.6, 2.5, 0.9, 4.0, 4.0, 0, 220.0, 250.0
You can reduce this to make the nosewheel steering less sensitive. It won't affect the rudder at all.
As always, make a backup of the cfg file before you make changes, just in case!
Have fun
Alan