If you have access to a working OSX installation, injecting the kext is easy.
IMPORTANT: make a copy of the ISO to be modified.
*from terminal:
1. hdiutil attach /"Your ISO File" -readwrite
2. mkdir ~/inject
3. mkextunpack -d ~/inject /Volumes/YourMountedISO/System/Library/Extensions.mkext
4. rm -rf ~/inject/AppleNForceATA.kext
5. cp -rp /path/to/new/AppleNForceATA.kext ~/inject
6. chown -R root:wheel ~/inject
7. chmod -R 755 ~/inject
8. kextcache -m ~/Extensions.mkext ~/inject
9. rm -rf /Volumes/YourMountedISO/System/Library/Extensions.mkext
10. cp -rp ~/Extensions.mkext /Volumes/YourMountedISO/System/Library
that’s it… now just eject the ISO and burn with diskutility or toast
you can also add whatever other kext’s you need using this method. just be sure to delete the old ones from the ~/inject directory first.
This gets you through the installation. Once install is done, you may need to reboot into the DVD and use the terminal to copy kexts to your newly installed system. I recommend keeping them on a usb thumb drive for post-install copying.
