If you want a cauliflower crust that works start with this link: http://detoxinista.com/2012/01/the-secret-to-perfect-cauliflower-pizza-crust/ It has great pictures and instructions! I am not trying to re-invent the wheel but maybe discuss what happened when I used the same recipe and pics/illustrationsand give you some insight.
Pulse the cauliflower down. I have a full size processor but it was still better to do one head of cauliflower in two batches.
If you stop a little bit before this stage they say you can use the cauliflower as a 'rice' for stir-fried rice! (I will try that out in the future also and give you a report whether or not its worth it)
Hand contour (spray your hand with nonstick spray so it doesn't stick) your crust so it looks like what you want.
Not to shabby!
THE MAN'S ALL MEAT PALEO PIZZA CRUST!!!