I've been having some problems with Starcraft 2 loading properly under bootcamp (screen kept flashing) and wanted to update the 320M nVidia drivers. The problem with the 320M drivers is that there are no official updates available from nVidia nor Apple, so you're left with using the stock bootcamp video drivers. I decided to make this guide from the bits and pieces of information I've found on the forum and because it doesn't look like anyone has posted an official guide. It took me a couple of hours of searching and testing, so I hope this guide will save time for others. Here goes! 1. If you've properly set up bootcamp, you probably have the Apple provided video driver installed. Before you do anything with new drivers, you need to uninstall the old ones. To do this: Right click My Computer => Properties => Device Manager => Display Adapters => nVidia 320M => uninstall 2. After you've uninstalled the stock driver, you need to download the new driver you want to use, as well as the modified .inf file. The .inf file are instructions for your computer on how to install the driver. This file is necessary in order for you to install drivers that have not been officially released for the 320M. You can download the necessary drivers + modified .inf from here: http://www.laptopvideo2go.com/drivers I chose to use driver version 259.32 as it is the newest. 3. To set up the new driver, follow this guide: http://forums.laptopvideo2go.com/topic/11997-have-disk-method-for-windows-7-vista/ NOTE: I found that a faster way to set it up is to extract the driver into a folder, put the modified .inf file into the folder and replace the stock .inf file, and then run the setup.exe file that is in the folder. You will get the same prompt that says "Windows can't verify the publisher of this software." From there, just click "install the driver anyways." And you're done! You may have to try different drivers to see what works for you as there is no one correct driver, but I don't think there's anything wrong with going the newest available. By updating to version 259.32, Starcraft 2 now loads properly and without any flashing.