im no expert but I've been told by fitting a 'thicker' front sway bar you can counteract the rear swaybar as it will 'induce' UNDERSTEER therefore reducing oversteer from the rear...

either that mate... OR...

focus on driving it without lift off through a corner... basically rather than hammering into the corner too quick, find a comfortable spot where you can still enter a corner with speed, maybe breaking straight deeper into the corner and then turn the wheel and once you start accelerating 'try' not to lift off the accelerator. try not to pulse the gas on and off. if you look at the vid, he keeps a steady pace all the way through the corner, there is no fluctuation.