Here are two quick reg hacks for customizing the appearance of ClearType screen font smoothing:
|FontSmoothingOrientation = 1, 2 or 3|
|FontSmoothingGamma = Between 1000 to 2000|
This setting basically adjusts the brightness. The higher you go the brighter.
This setting determines the way your monitor pixels are constructed.
None = 0 (e.g. CRT Monitor)
RBG = 1 (Default and used by most LCD monitors)
BGR = 2