Photoshop :: Radial Blur On Wheels

Just recently so many car cover magazines have wonderful covers on them. I have searched for how they achived this look. But i have come up with very little. There are 2 old threads about how to get the wheels and background look like the car is moving, but in fact the car is stationary. The hardest part is how to radial blur the wheels but have the brake caliper frozen still. I have taken a picture from Easton Chang! He was the orginal one that posted about this. That was in 2003. You can find his work everywhere now.

I know one thing is that you have to make a selection of the wheels and transform them so they are flat. But still don't know how to get th caliper and rotor look like they are frozen. Just look at Easton's work.