I do this one trick. I load a music CD or play a custom soundtrack on my XBox. I disconnect the video and left channel cables from my AV ports, then I load a game in my PS2 and connect only the left audio channel and video cords to the AV ports. So I'm pretty much playing Suikoden III with Symphony X music playing in the background. And turning the music on and off is as simple as pressing the white button on my XBox controller.