need help with enabling Intel 855 drivers

Hi,
Firstly, I am a complete newbie at this, from a background of Windows and DOS!

I have a Novatech 259iil laptop which uses the 855 chip set, (1.8Mhz cpu, 60Gb HDD 1Gb RAM), which has occasional screen "blackouts", and currently has the "vesa" driver installed, (AIGLX rendering), and I wanted to upgrade to the "glasen" drivers.

I found the following method, Here: http://www.neowin.net/forum/topic/980676-ubuntu-1010-screen-resolution/ and proceeded with the upgrade.

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Step-by-step to Enable Intel Graphics Driver for Ubuntu 10.10:
Install the updated Intel graphics driver by:

sudo add-apt-repository ppa:glasen/intel-driver
sudo apt-get update && sudo apt-get upgrade

To enable the Intel driver you need to create a file called /var/log/xorg.conf containing the following:

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

X freezes (GPU lockups) are still being experienced on i830, i845, and i855 chips. There is a kernel patch for the Intel 855 series chips that appears to fix the system freezes. After re-enabling the Intel driver as above, i855 users can set by this:

sudo add-apt-repository ppa:glasen/855gm-fix
sudo apt-get update && sudo apt-get install dkms 855gm-fix-dkms

This will provide an updated version of xserver-xorg-video-intel that may provide better results than what you currently have. After you add the the repository run:

sudo apt-get update and sudo apt-get upgrade

If you don't receive updates to the xserver-xorg-video-intel then run:

sudo apt-get install xserver-xorg-video-intel

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Now this is the bit where I get to look an absolute idiot! When I get to the part:

To enable the Intel driver you need to create a file called /var/log/xorg.conf containing the following:

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

So, I created a file using the terminal, and "sudo touch xorg,conf" which went OK, I then went to edit the blank file to write the contents, and when I tried to save it, it came back at me that I don't have root permissions and I'm not the owner, which I am!

I have been racking my brains and going around in circles for the last four days, with no success!

Interim sum up: all of the packages are downloaded and installed. A BLANK file xorg.conf is written in /var/log, awaiting the contents, so as to enable the drivers.

I am convinced that I'm doing something really simple, wrong, but I can't think of what that might be, any help please.

Is there any really simple way to enable the drivers?

Regards

Terry