If you think of Linux distributions, then it will probably be the most used in Ubuntu. It really has been successful, mainly because it is very easy to use. If you want to feel like a Linux user, then install this theme and make your Ubuntu look in Windows XP.
Ubuntu XP is a tool pack that allows you to convert the appearance of your Windows XP and it will look like the Ubuntu interface.
Visual Themes, Icons, wallpapers, loading screens, Firefox skin and the famous 3D cube effect are included in this great package which will install all of them or you want easy and easy installation throughout.
If you want your Windows XP Linux look, then Ubuntu XP will not disappoint you. Enjoy a Ubuntu look and Windows compatibility.