I’m sure most of you like the way the Vista icons look. There’s a smooth, new feeling to them. Here’s an alternative to actually installing Vista, or even using Vista Customization Pack: Icon Tweaker. Here’s what you’ll have to do:
1. Download Icon Tweaker.
2. Install Icon Tweaker.
3. Download the Vista Icon Pack.
4. Extract the ZIP file and install the icons.
5. In Icon Tweaker select the Vista icon and click Load Theme.
!Warning! – Failure to fulfill step #6 will lead to a system crash!
Source: BARRY’S BEST COMPUTER TIPS