For all of you wondering what Microsoft are talking about when they state : This product is pre-pidded, here is your answer!
What Microsoft are trying to say is: The product key is included with this product. The product key will be hard coded in the area where you are supposed to enter the product key. Because of this it is possible to install the product multiple times without activation issues.
Hope this helps! If you know of anymore Texan farm slang that Microsoft use on their MSDN site, please include it in the comments.