You need to patch AppeIntelCPUPowermanagement.kext - without a working install you could try dropping nullcpupowermanagement.kext into /system/library/extensions from a windows install (with macdrive etc to read the mac disk?) and boot with -f -v.
On Nvidia, unless DoiX has made any progress I think it's safe to assume that it will not work for the foreseable future under Mac OSX.
thanks darren cox Usually patch appleintelcpupower.kext