Skid Dynamics

I'm curious, has anyone out there ever programmed skid dynamics for a four-wheel vehicle? I've downloaded many demo games that were made with gamestudio and never seen any skid dynamics programming at all.

If no one has been able to do it, then i'm probably the first, i've played around and made the vehicle I was playing with capible of drifting and skidding.

I've been working on physics drifting for a while now, with mixed results. I'm probably going to ditch the gamestudio physics approach altogether because I can have better behavior control (center of mass etc) with homegrown physics.