try selecting NVKUSH..with no Ndarwin or Nvinject in installation.
You dont need to install the whole system again, but pop in the install CD and unselect all and select only NVkush or Ndarwin or Nvinject. Try one by one.

Or if you have the files in harddisk already, then you can try installing them in the single user mode.

Better Luck
Nagu