Yeah you can change each aspect of the graphics separately.
With the drivers from that website, do you just download and install them? I heard something about a modded INF and that put me off
Not exactly.
1. Go look in the forums for the particular driver version. In this example, we want the 163.44. Here's the thread:
http://www.laptopvideo2go.com/forum/index.php?showtopic=14562
2. Download the driver from the link at the top of the page.
3. Next to that, download the Modded INF via the link.
4. Locate where you downloaded the nVidia drivers. What you need to do now is extract the contents of the .exe file. I use 7-Zip for this. You should now have a folder with over 150 files. Delete the .exe you downloaded and extracted, it won't be needed any more.
5. Now, simply copy the Modded INF into this folder, over writing the previous version.
6. Uninstall the previous drivers and simply run the setup.exe inside the extracted folder. Drivers should install without a hitch.
There is a small problem with using modified drivers.
The nVidia mobile GPU's contain a feature called PowerMizer. Basically, this means that the GPU can be under clocked when not under anyload/battery and ramped up in speed when loaded. Pretty much how Speedstep works on Intel CPU's.
In order to utlise PowerMizer, you need to use the nVidia drivers specific for mobile GPU's. As the 163.44's and other modified drivers are based on the desktop drivers, they don't support PowerMizer.
If you're using the laptop on battery, then this will have an effect on battery life. If the laptop spends all its time connected to the mains, then you don't have to worry about it.
Unfortunately, the desktop drivers are a lot newer and released more frequently than the Mobile drivers, so its a decision you have to make.