I just got iatkos working on one of my machines (asus s9 lappy), and I was trying to fix the graphics. I downloaded this and installed it:

NVIDIA 9000 series - Downloads - Kexts.com

I then restarted, and it is just hanging on the start screen - gray apple with spinning wheel underneath. What can I do to fix this? Machine has the Nvidia GeForce 9300m G.