How do you set the default/startup orientation for the Windows Phone 7 emulator?

I am working on a Silverlight based Windows Phone application that only supports landscape orientation. However, when I hit F5 to debug it, the emulator always starts in portrait开发者_如何学Go mode.

Is there a way to set this to default to landscape?

As far I'm aware it is not possible, but is this a big problem? Remember you don't need to close the emulator while you stop debuging - it can stay on landscape mode and VS will connect to it.