Graphics Injectors Never Load at Startup

[CoinCollector]

I'm on 10.5.7 and I've been trying to get my Nvidia 7900 GS 256mb graphics card to work. I've tried several graphics injectors including NVinject, Natit, Titan, and NVKush, but none of them seem to load after I install them. Whether I'm installing them manually or using an installer program, I can never seem them loaded in Terminal using kextstat. I'm positive I'm installing them correctly, but they never seem to load! They do load successfully using kextload, but that's no good since the system is already booted. Also, I always have only one installed at a time.

[Ianxxx]

Use efi string, I used to have a 7900gs and it worked fine. There are a couple of different programs to automate installing a string