Launching XBMC in 2nd Monitor with audio

Before I start messing around with one of my set-up, I was wondering if this was possible.

I want to launch XBMC, so when it starts, windows automatically switches to my 2nd monitor (TV) attached via HDMI, with audio through HDMI, switching off audio to my computer speakers.

Ultimately it will be:

I press the green button on my remote,
Windows shifts from Primary monitor to second monitor (TV)
Computer audio disabled, audio via HDMI to TV enabled
launches XBMC.

Press off button on remote
Shuts down XBMC
Monitor shifts back to primary monitor
audio switches back to computer speakers.

I can sort out the keymaps later.

This is on XBMC Eden.
Is it as simple as changing the video and audio in the XBMC settings?