It's likely not the suspension that's the problem.
It's likely the Limited Slip diff. or the distribution of power.
You can try adjusting the power, via the VCD so that only 10-20% of the power is going to the front wheels.
Or you can adjust the front diff down to almost nothing.
Also, try raising the rear end in 5-10mm increments, till you get the turn-in characteristics you like.
Only futz with one of these at a time, as you might put the car into snap oversteer if you get too zealous with your changes.