Hardware problems

[brickbat]

Hi, I installed your image. Thanks fr making it. I have managed to get past the infinite loop. I still have the following problems to fix but I am a noob and I don't know what to do.

1. I have a NVIDIA Geforce 7600 and I think your current drivers are not appropriate. HYow can I remove your drivers and install the NVINJECT ones?
2. My sound is AC97 ALC850 and I need to install a kext for it but I've never done that before. Can someone give me the commands please?
3. Neither of my LAN ports work. I think one of them is NVIDIA and the other is Marvel yukon,