display stopped working in Ubuntu after installing the intel 855 driver

This is part of an ongoing issue I am having installing Ubuntu onto a machine wich has Intell 855 embeded graphics.  In a previous question I asked where I could find a driver and was given a link to a good step by step tutorial on how to achieve this:

http://absolutebeginner.wordpress.com/2006/07/26/installing-intel-815852855-graphics-controller-drivers-on-ubuntu-debian/

I followed the tutorial and all seemed to go well until the end when Ubuntu prompted me to restart the machine to finalise the changes.  I hit restart and the machine close and started to boot up as normal, but as soon as I selected Ubuntu from my Grub, the screen went blank.

I am thinking that there is some issue with the graphics driver, but being a newbie to linux, I have no idea how to go about doing this, or what the problem with the driver was in the first place.