For those of you who like Vista’s transparent windows but can’t afford to actually buy Vista, this is just what you need. This little program works under Windows 2000/XP and allows you to set a custom level of transparency for each of your windows and it hardly consumes any memory resources. With the latest version, you can also make the Windows Taskbar transparent. Click here to download Glass2k and learn how to configure it.
Source: BARRY’S BEST BLOG