Scottspeed knows all about this trickery Using a simple program you can utilise steering input,G load and wheel speed to give you a "race" style VDC. Sensors are required for rear diff,front wheels,steering angle,Gload.(It can be managed by a G4 or Motec too)
Unlike std VDC that reduces throttle and applies brakes this system holds the brake(s) on for the inside front/rear wheel(s) when cornering. Which is further adjusted by G load and throttle opening. It then loads or unloads the centre diff as required.
If you have a V7 or above with dial up DCCD and airbags,Abs the sensors/computer are present.
Dwight can load a program that then allows you to dial up various programs for each setting of the DCCD wheel.
When you are happy with one of the programs he can then create another program that allows fine tuning of the program that you selected to further the ability of the DCCD system that will further match your driving style.
He has been doing this for Emma Gilmour,Chris West,Richard Mason,Dave Thexton for a few years now. ;)
Old school WRC Subaru Prodrive stuff. :D