wanna hear something cool?
if you add the line "differential_braking_scale = 1.0" below the two mentioned above, you can have rudder activated differential brakes on any aircraft you desire

works great for those hard taxiing planes

Excellent tip, Moach...

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I applied it to my Default Beech Baron 58D and it works a treat...!
It has always been a bit of a handful trying to taxi by twisting the joystick with one hand to turn the rudder, operate the throttle with the other hand, and at the same time tap F11 and F12 to operate the differential wheel brakes....

....Not enough hands...LOL...!
Now, the differential wheel brakes are automatically applied when the rudder is operated...works beautifully when performing tight turns and avoiding colliding with objects....Fantastic...!
Cheers Moach...

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Paul...experiencing a taxiing time...

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Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.