How To Install Driver N-Vidia In ubuntu hardy 8.04

Last i have eror with install driver N-Vidia in my hardy. the problem is i can install N-Vidia but cannot load the N-Vidia driver. this eror is in x-org config in my ubuntu.

I have googling and have fix with this my tutorial in below.

1) Download the driver for your Nvidia Card from http://www.nvidia.com/Download/index.aspx?lang=en-us
1.a) Make sure its in your home directory, this will make it so we don't have to change directories later when were in terminal.

2) Open a terminal: Applications--> Accessories--> Terminal

3) sudo apt-get install build-essential

4) gksudo gedit /etc/modules
4.a) Add "nvidia" without quotes to the list.
4.b) Save and Exit

5) gksudo gedit /etc/default/linux-restricted-modules-common
5.a) Add "nv" without quotes to the restricted list. It should look exactly like this: DISABLED_MODULES="nv"
5.b) Save and Exit

6) sudo cp /etc/X11/xorg.conf ./xorg.conf.backup

7) sudo rm /etc/X11/xorg.conf
7.a) Were just deleting your old xorg.conf file, we backed it up in step 6 just in case we ever need it back again.
7.b) Getting rid of old drivers, use one or more of the sections that apply to you:
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If you used Envy to attempt a previous nvidia install please run this command now before you go on:

sudo envy --uninstall-all
sudo dpkg -P envy

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If you have some old Ubuntu repository/restricted driver manager attempts installed please run this command before you go on:

sudo apt-get remove --purge nvidia*
sudo rm /lib/restricted-modules/.nvidia*

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If you have a failed NVIDIA*.run (drivers from the nvidia.com site) run this command before you go on:

sudo nvidia-installer --uninstall

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## Alright Now Assuming That You are starting with a clean slate lets move forward##
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8) CTRL-ALT-F1
8.a) Okay were in Command Line only now, we have a little left to do in here.
8.b)login:
8.c)Password:

9) sudo /etc/init.d/gdm stop
9.a) This step shuts down the x-server and gnome desktop manager

10) sudo chmod a+x ./NVIDIA*.run
10.a) We made the nvidia installer executable.

11) sudo ./NVIDIA*.run
11.a) Answer to the affirmative for all questions.
11.b) Be sure to specifically say you DO WANT it to write a new xorg.conf
11.c) If you somehow answered incorrectly on the last question in the installer then:
c.I) sudo nvidia-xconfig #this will write a new or attempt repair of
an xorg.conf file for you.

12) sudo /etc/init.d/gdm start
12.a) You should see an Nvidia Logo, and then be put at your login screen,
you should also be able to enable desktop effects.

Optional But recommended:
13) To get the driver to update itself when a new kernel is installed from the update
manager be sure to follow the guide in this link:
http://ubuntuforums.org/showpost.php?p=5227704&postcount=1

now, i can load use compiz and activated water effect. very nice.. .