Just found out something like Visual Studio Professional 2012 can get the job done, this post is now redundant. Sadly, I can't accept my own comment as answer.
How do I get an activation key for Visual Studio 2012 Express for Windows Phone?

MIHAI CHIRIAC
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I have recently decided to download the Windows Phone SDK 8.0 in order to try creating some XAML apps for my Windows 7 Mobile phone. I have found an offline installer for the SDK + Visual Studio 2012 Express for Windows Phone here, but I soon realized that I couldn't activate this product as the Register online
link lead to a 404, and I've been searching online for a while to find some place where I could obtain such a key, but I had no luck. Is there any way I could activate this product legitimately? As of this post, I have 29 days left of the free trial.
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