Boot with -s and type the following:mount -uw / rm -rf /System/Library/Extensions/NVDAStartup.kext rm -rf /System/Library/Extensions/GeForce.kext rm -rf /System/Library/Extensions/NVDAGF100Hal.kext shutdown -r now
The dual graphics is a problem, the Nvidia card will not work, but the kexts are loaded. After you get to the desktop, create a DSDT and disable the card. Resources on how to do that are available on the forum.
I can not get to the desktop after leaving the white background with the apple gets a black screen and there does not advance. what should I do?