Is it possible to have 5.1 sound from my 360 like this?

If I buy one of this and then connect the red and white connectors of the component cable to that, and then send it via a cable to an "aux in" thing in my 5.1 "subwooffer" on my old creative 5.1 system? Is it possible? Thanks

The thing is this 5.1 creative system doesnt have optical input so I was think in doing it like that. But I dont know if I will have 5.1 sound with that.Will I? If i select dolby pro logic II in the xbox 360 settings will all speakers work? Thanks

It will work, its just wont be dolby digital. But it is better then having just a 3 channel system

Go for it