Install NV driver under Ubuntu 8.04.1

The process is very similar to install it under Mandriva 2008.1.

1. Prepare driver; install "build-essential" package.
2. Use root permission to rename 2 file under /etc/rc2.d:
-a.) S20nvidia-kernel (I rename it to __S20nvidia-kernel)
-b.) S30gdm (I rename it to __S30gdm)
3. Reboot and use root permission to change to your driver's dir and run:
root# sh NVIDIA-xxxxxxx.run
4. No not use nvidia-xconfig, just manually edit /etc/X11/xorg.conf. (refer to Mandriva's process).
5. Use root permission to rename back the files /etc/rc2.d/__S20nvidia-kernel and /etc/rc2.d/__S30gdm to their original file name.
6. Reboot it and enjoy it...;-)