Mac-over (Makeover) For your Windows PC running XP or Vista
What you see is not from MAC OS. You can get this same look and feel from your vista or XP. It is simple you just need to install
ObjectDock which is free. ObjectDock is simple software that can be download from Internet and install in Vista. It has couple of options that can be used to customise its icons, remove windows task bar, add start button.
Download:
http://www.stardock.com/products/objectdock/