From Manuel Hoefs:
With SevenMizer you can transform your Windows XP, MCE or Server 2003 into the look of Windows 7. Therefore nearly 400 files with new Icons, pictures as well as videos are modified. This means that SevenMizer does not provide own files and change your system files. That has the advantage that SevenMizer works with each language and no changes of the language specifics are made. The installer is so developed that you have completely the change which will be modified and which not.