@saint:
my advise would be to refrain from using the nose wheel steering at all above 60-80 kts. (or until you're ready to vacate the runway)
Use only your brakes to maintain center line (no rudder if no x-wind)
If you see the aircraft going to the left, just release a bit of the left pedal, or increase your pressure on the right one.
The most difficult part will probably be the reflex to put right rudder if you feel the aircraft going left, so you'll just have to think about having your rudder neutral, and only focusing on the brakes