silvart, that's my point, it doesn't matter. He didn't need to go find an adapter for it, but if he has one, fine.
It will be complicated no matter how you do it. Girder will probably be the easiest way. I can't write an application to do it because no longer have an Audigy. I sold it precisely because of these two problems (CMSS and bass redirection).
Now I have a PCI Audigy 2 with the kX Drivers (in my HTPC too) and everything is perfect. You can use those kX drivers to do ANYTHING.
edit: Look at this: