Several things to cover..
But first, on the one hand certainly no worries about taking time to respond! Tho on the other hand, just fyi, you should normally receive an automated email notice from TechSpot when the thread is updated with a new post. If you’re manually checking for the thread for updates all the time, then you might have a TechSpot setting incorrect for thread notifications
As for your problem
At the moment, I’m just as puzzled as you as to why you’re having such a hard time with these installs 
- The nVidia chipset drivers look like they should match your system
- But just as important (and significant to know) these appear to be the SAME chipset drivers that others have reported working just fine for their same system as you have
- Not to mention the specific driver I had you try to manually install is a spot on match for the hardware device it was supposed to have updated (vs. your crash!) ARGHHHH
- (btw.. that’s why I was originally optimistic with that very first nVidia chipset install attempt. That it would fix your problems once we had MS UAA and other stuff installed and working for sure before hand... )
But Windows can be a pain. And like I said at the start, things can be different for different systems so we’ll keep looking to see what’s your specific problem.
Now, all that said, a couple things before moving on
To prevent XP from auto-restart on a crash (so you can read crash screens and manually restart)
- Rt click My Computer->Properties->Advanced Tab
- Click Startup and Recovery Settings button
- Under System Failure
=> Check write an event to System Log
=> Uncheck Automatically Restart
Also, before continuing, question is: Do you use backup software? Have you backed up your hard drive before we continue?
At minimum you want to be sure you've backed up all your files and folders but i personally strongly urge you invest in backup software that can not only do file/folder backups but can do a "ghost" image backup of your hard drive.
A "ghost" image back not only assures conventional file/folder recovery but also gives you the option to simply recover the current disk image at time of backup. This assures that even in worst case you should be able to recover your complete installation on the disk. Personally, i use Acronis True Image 2009. IMHO It's the best $50 buck investment you can make in your computer to help avoid disaster.
If you buy it online (vs. a box version) first thing to do is create a bootable Recovery disk. Allows you to boot directly into Acronis and recover a disk image if your computer can't boot from a current/corrupt boot image
And as for next steps
1) make sure you got things backed up (ghost image backup is best - if you need assistance as to how to use Acronis, lemme know)
2) Will take me awhile, but I'll follow up with instructions that will to dump alot of your internal systems data about your system to hopefully let me see what's going on inside your system preventing all this from working (no guarantees, but hopefully, it can reveal where problem is for your system) But it potentially means a lot of diagnostic work ahead to try and figure out your problem