Spoofing is changing one drive model's firmware to make it look like another drive model...Say if it is a liteon dvd drive you could spoof it to look like a benq or samsung or hatachi..This is not recommended and will get you banned quickly...Injecting is when you put your dvd key into a custom firmware and flash it to your drive in order to play your backed up games..This can also be done to stock OEM firmware, if you don't have yours, to flash it back to stock. I don't believe you can change the key inside the nand.Cog