XPize patches several dozen bitmaps, icons and avi files it makes over all of the "leftover" bits from windows 2000. How long did you use XP before it was XPized? There are a great many differences. All of the avi's to afaik have been changed and the interface as a whole has a much more pleasing look to the eye. Saying XPize is simply a theme is like saying XP is simply a service pack of windows 2000. Simply compare the differences in these 2 pics and you will see a portion of what xpize does.