There are two things I found that you can do for tail draggers to make them handle better on the ground.

One, with AirEd increase the "Rudder Control Effectiveness" slightly, and I mean slightly. Too much and you get into a twitchy acft. while flying.

The other, which I have done to all my tail draggers is change a number in the Acft.cfg file. You are increasing the number there by 180, which is 180 degrees. Basically you are rotating the tail wheel 180 degrees.

This is from my Hellcat, go to contact points and in the first line look for the 8th number.

                                                                         ***
point.0=1, -19.00,  0.00, -3.98, 3200, 0, 0.40,180.0, 0.30, 2.5, 0.70, 1.0, 6.0, 0, 0, 135

This number was 0.0 on my Hellcat, changing it by 180 degrees made a huge difference on ground handling.

~S~ Otto, Fireman,

I've set the relevant entry in the Contact Points section of the aircraft.cfg file for all my stock taildragger aircraft to 120

I find this gives even better ground and deck handling.

~S~

Pads

  I almost hate to ask, but have you tried using the left and right brakes for steering? (, & . keys). That's whats done most often in rreal life.