Help setting up multiple sound cards in a single Windows box

[Nicepants42]

Ok, so I've got on board sound, and X-fi, and a USB audio device for a VoIP headset. The problem is, Windows seems to want to use the most recently installed solution by default, and the only way I know of to control what audio device actually outputs the audio is to enable/disable audio devices in the device manager.

My question is this: Is there a way that I can configure Windows to use certain audio solutions in certain circumstances? For instance, if I wanted to leave my X-fi and my USB audio solution enabled, could I tell Windows to use the X-fi for games, music and movies, and use the USB solution only for programs like Skype?

Anyone know if this is possible in Vista?

Thanks in advance for your help, [H].