I tested RC3 GraphicsEnabler feature with several motherboards/video cards/CPUs/10.5+10.6.
It seems whether Nvidia injection works depends on motherboard ( DeviceTree postion ? ).
When Chameleon reports PciRoot(0x0)/Pci(0x02,0x0)/Pci(0x0,0x0), it always works regardless of OS/CPU/VC.
( Gigabyte GA-MA770-DS3, Asus M4A78 Plus, Asus P5B-E, etc. )
When it repors PciRoot(0x0)/Pci(0x10,0x0)/Pci(0x0,0x0), it doen't. It requires other injectors ( ex. ATY_Init )
( Gigabyte GA-M720-US3 )