Dual'ing Windows Phone 7 Emulators - Setting up your environment to deploy and debug in multiple WP7 emulators
"I’m developing a multi-player Windows Phone 7 game. Now I don’t know about you, but I find it hard to test a multi-player application when I’m only allowed to run one instance of it. And that seemed to be the case with Windows Phone 7 applications. Microsoft provide an Emulator, but it’s a single-instance application: however many times you click its icon, you only get the one window.
Googling found me a useful article on how to run multiple instances of the emulator. But it didn’t tell me how to deploy applications to them, or how to debug those applications. There was however, a post in the forums, somewhat reminiscent of Monsieur de Fermat scribbling's, that gave me hope that what I wanted to do was indeed possible.
So I set out on a journey of discovery.
About an hour later, I had this,
Step by Step instructions
As Samuel says that is not supported by anyone in any way, but that doesn't subtract from its "zomg that's awesome" factor...