I don't recall which version of Chameleon that I made the attempt with, but booting with graphicsenable=yes option set got full resolution working. Card showed as 'NVidia' but unknown type in the system profiler. There were no OSX drivers available from the NVIDIA website, the NV160M doesn't have any official support for the OS. If I'm feeling froggy over the next couple of days I might give it another shot, but I've got a D820 and a 4300 working flawlessly with 10.6.8 at the moment so it's not a really high priority. More of a science project really.