I am sorry for my English.
The problem is NVDANV40Hal.kext 10.6.3, that have a bug. In 64 bit mode don't works, in 32 bit mode has errors.
I'have partially solved with older NVDANV40Hal.kext, but with some graphics issues (apple transparent in the bar and others)
64 bit basically not so excite, how returning QE/CI. you could not lay out the NVDANV40Hal. At me even windows for 15 seconds are turned off, to work practically not probably...