Burton Thanks for you kind words and all who have to replied. I havent been using hexagon that long but the work flow im using is base mesh in Hex then to zbrush 2 for detailing and texturing. I would add basic form and detail to base mesh then maybe back to hex to redifine edge flow. Genraly use both as and when I need them.
The Car main structure was made in hex 2.1. I like the smooth tool better in zbrush than hex so I use that to round off harsh edges and in general give it flow. Iv also use zbrush symatry tool to add details to the rims not shown in the above picture, The Leather seats that where very basic in hex but used the inflate tool, smooth and alpha from a picture taken of my real leather seat.
The dash of the car I used zbruhs to add fine details as your see when its finnished.
As regards the wheel spokes you can see my video tutorial here http://forum.daz3d.com/viewforum.php?f=65 athough I cant even find it myself . I can arrange for you to get it somehow though.