I really oversimplified my earlier explaination -it's kinda difficult when dealing with offsets/backspacing/suspension bits/fenders. You could go nuts trying to figure it all out.
I learned quite a bit trying to stuff some 17x9 wheels into a car after I had converted it to coilovers. Nothing seemed to fit, because the coils were rubbing the tires. I had all kinds of cardboard templates out in the driveway trying to make things fit. It was a painful learning process, and it actually cost me a set of nice wheels.
Here's a really good site explaining some of the finer points of wheel selection:
http://www.rsracing.com/tech-wheel.html
As for those Chamber wheels, they really are sweet (especially in black), but it looks like none of them will work. Wait for the Colorado/Canyon pickups to gain popularity -they have a close fitment to us.