Microsoft has some downloads for Windows XP called Powertoys. You can access them here. I recently installed the ClearType Tuner on my system. It purports to make text on the screen easier to read by smoothing things out a bit, and it has a wizard that give you a few examples of text and asks you which set looks better, and then it automatically adjusts for your preference. It takes a little while to get used to everything looking different, but I'm starting to like it. If you're interested, you can download it. If it doesn't look good for you, it can easily be reversed in the Control Panel.