If you want to change the look of your Windows Phone 8 emulator
You can now do this using the WP8 Emulator Skin Switcher to make it look like a Nokia Lumia 920, HTC 8X or Samsung Ativ S. Which is perfect for when you need to run demos and the emulators during a presentation.
Here are some of the awesome devices available
How to install it?
You simply download the zip file
Double click on WP8 Emulator Skin Switcher
You will then be prompted with a Windows Smartcreen warning which if you click ok will close the windows
Click More info instead of ok
Once you click more info a new window will appear click select Run Anyway this will install the app and add a application called WP* Emulator Skin Switcher.
Hope this helps