ati-driver-installer-9-6-x86.x86_64.run howto install with "super-user"

im trying to install "ati-driver-installer-9-6-x86.x86_64.run" the file is in 2 locations /home/dawei

I also have another copy on /home/dawei/desktop

Im trying to install the ati Radeon drivers for my 4870 graphics card. This is my first linux install and im using Linux mint, I really want my graphics card to be working right because I love Linux so far and I want everything to work perfect so I can start loading some video games and compiz effects.

Whenever i try to install by double clicking the terminal pops up then stops at "You need to run this installer as super-user"

Ive tried all kids of commands from the forums but to no avail.

1st try
dawei@dawei-desktop ~ $ sudo ati-driver-installer-9-6-x86.x86_64.run
[sudo] password for dawei:
sudo: ati-driver-installer-9-6-x86.x86_64.run: command not found

2nd
dawei@dawei-desktop ~ $ sudo chmod 4755 ati-driver-installer-9-6-x86.x86_64.run
[sudo] password for dawei:

3rd
dawei@dawei-desktop ~ $ sudo visudo
[sudo] password for dawei:
 username ALL=(ALL) ALL, NOPASSWD: /home/dawei------ did something similar to that to give acess to the directory, then i tried it again for the individual file, but i dont think i typed it in correctly. I tried to save with control x then would try and double click the file but still didnt work.

Hopefully i didnt mess up my computer already.

here is my xorg.config, I have no idea if its necessary but people in other posts put it down.

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Monitor"
 Identifier "Configured Monitor"
EndSection

Section "Screen"
 Identifier "Default Screen"
 Monitor "Configured Monitor"
 Device "Configured Video Device"
EndSection

Section "Device"
 Identifier "Configured Video Device"
EndSection

Section "ServerFlags"
 Option "DontZap" "False"
EndSection

----------------
heres a breif exerpt from my xorg.0.log

(II) RADEON(0): Output: DVI-0, Detected Monitor Type: 3
(II) RADEON(0): EDID data from the display on output: DVI-0 ----------------------
(II) RADEON(0): Manufacturer: BNQ Model: 7726 Serial#: 21573
(II) RADEON(0): Year: 2008 Week: 46
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Digital Display Input
(II) RADEON(0): Max Image Size [cm]: horiz.: 48 vert.: 27
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): DPMS capabilities: Off
(II) RADEON(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
(II) RADEON(0): Default color space is primary color space
(II) RADEON(0): First detailed timing is preferred mode
(II) RADEON(0): redX: 0.648 redY: 0.339 greenX: 0.282 greenY: 0.603
(II) RADEON(0): blueX: 0.143 blueY: 0.070 whiteX: 0.312 whiteY: 0.329
(II) RADEON(0): Supported VESA Video Modes:
(II) RADEON(0): 720x400@70Hz
(II) RADEON(0): 640x480@60Hz
(II) RADEON(0): 640x480@75Hz
(II) RADEON(0): 800x600@60Hz
(II) RADEON(0): 800x600@75Hz
(II) RADEON(0): 1024x768@60Hz
(II) RADEON(0): 1024x768@75Hz
(II) RADEON(0): 1280x1024@75Hz
(II) RADEON(0): Manufacturer's mask: 0