Can that be done from the add/remove menu of the control panel? because a lot of these sites that reccoment the older drivers also mention unsing Driver Cleaner which can horribly bork your PC up if you do it wrong. It seems like far too much trouble for one game.
Alright, let's see what we can do here.
First things first, download whatever driver you want (usually the latest, but in your case . . . ). I recommend saving it to your desktop for easy finding.
Second open up the Hardware tab of the System Properties menu (right click on my computer, properties; or hit the windows button and pause/break) and click on Device Manager.
Now, in the Device Manager click on "Display adapters" and it should show your card. Right click on your card and uninstall the driver.
After it uninstalls do not restart, yet. Go to your c: drive and click on the NVIDIA folder. In here you want to delete all video driver related folders (otherwise your system will automatically install whatever's present on the next reboot and we don't want this). Again, make sure it's only the video driver folders, which should be numbered 169.12 and whatnot.
We want to get into Safe Mode now: follow the instructions at this website if you don't know how.
Upon reboot Windows will install a generic VGA driver, this is fine. Now run a registry program like CCleaner and have it fix/delete the errors it finds (and yes, backup when it asks you to). Then you will want to run a program lke Driver Cleaner.* I prefer Driver Sweeper as it's free and can be found at guru3d: http://www.guru3d.com/category/driversweeper/
And yes, these programs can more or less cripple your system is used incorrectly. The only caveat in this situation is to make sure you clean out the Nvidia VIDEO drivers and NOT chipset drivers.
After you run the program, reboot.
You should be good to go.
*Note: A driver cleaner or driver sweeper program is not essential unless you are switching card manufacturers (a la Ati and Nvidia), but it is recommended when rolling back to an older driver like you are proposing.
Edited to say that really you can skip the whole driver cleaner thing if you want. Simply unistall the driver and reboot then install your new driver. If you don't have problems, be happy. If you do have problems then try again while also employing driver sweeper at the right time.