7TP (Seven transformation pack) will transform your entire user interface, including a 7-themed Boot Screen, Welcome Screen, and Visual Style, as well as new icons, wallpapers, and more. You can download 7TP (20Mb)and view screen shots from here or here.
Want to give a new visual style to your Windows XP? Seven Transformation Pack (formerly Vista transformation pack) will convert your Windows XP based system to look like Windows 7 and some of its features emulated. You don’t have need any 3rd-party applications to get Windows 7 UI experiences. This Seven transformation pack will simply make it done for you for free.