Where do I put these? I downloaded it from here : http://www.wincustomize.com/skins.aspx?skinid=1703&libid=2

Do I have to restart my computer to take effect?

Does anyone know?

I would guess that you could open it with this product

http://www.stardock.com/products/iconpackager/

I'm not sure what the policy for warez is on this forum, but phazeddl would be a good place to look ;D

In fact, there's a link to iconpackager at the top of the link you provided, haha