Glass2k will quietly sit in your System Tray all the time without hampering computer performance at all, even on older machines, so Windows XP users should be delighted with it.
Still, the whole process basically comes down to this: make sure the window you wish to add transparency to is the active one and press the selected keyboard combination to enable the effect. You can thus configure key settings, choose the Taskbar transparency, but also enable some other settings such as a beep every time you enable the see-through effect. One of the best things about this utility is that it relies on a simple and very easy to use interface, with just a few options displayed in the main window. Glass2k is an application supposed to help you in this regard, as it gives you the option to add transparency to all windows on your screen using just some keyboard shortcuts. There's no doubt computer users like eye-candy windows, so it's no surprise that downloadable software solutions supposed to change a thing or two about the way the operating system looks enjoy an impressive success.