If you're using Windows XP but with a serious Mac crush, you must have liked FlyakiteOSX to make your desktop appear and work like, a Mac. I installed FlyakiteOSX in our office desktop computer and it really turned windows XP into Mac OS X.
Now, Vista users—even those upgraded to Service Pack 1—have Vista OS X Ver.4 for a similar OS paint job. The installer requires that you disable the User Account Control to properly install the Vista OS X. You'll get screensavers, wallpapers, a "Dock," and more goodies, all accessible from the basic "Themes" menu. Don't worry about not liking it because the theme completely uninstalls itself when you're ready to move back to Windows; I haven't tried it myself, so let me know your experiences in the comments. Vista OS X is a free download for Windows Vista systems only. You can download Vista OS X here or here or here or here.
