Download drivers from
Welcome to NVIDIA - World Leader in Visual Computing Technologies and install them.
Also, you can adjust the ingame settings to make things look a lot better (mesh, terrain complexity, etc.). Also, with the NVIDIA settings, you can adjust Anti-Aliasing, and Anisotropic Filtering. You should be able to max those out with that card and that small monitor (relatively speaking). What resolution are you running at? 1024x768 or 1280x1024? AA should really help out at those resolutions.
Hope this helps. If you need any other help, you might also ask the extremely knowledgable crowd at avsim.com. There are a lot of tweaks for FSX that can make it look almost photo realistic!