I did most of my wiz-wheels using the old Paint Shop Pro 7. I searched the web for an accurate template of the style of wheel I wanted to do, and then I simply drawed mine in a new layer over that graphic. Worked very well always.
I admit it is a bit of a prehistoric method pf doing things, and labour intensive, but hey I'm spaniard and that's how we do everything, and why our coutry is still lagging so much behind the rest of the developed world