Alchemy TV sound out port

Hi,
Following this hint (http://www.macosxhints.com/article.php?story=200504261547021), I tried to get surround sound using the Sound Out port of my Alchemy TV DVR card. Only one problem: that port won't appear in System Prefs. The input does, but not the output. I have the latest software installed. I could have great surround sound with this but I can't get sound out through the card! I can only got sound out through the card using the Alchemy TV application.

If I choose "Internal & external" in the OS sound chooser dialog that appears in the Alchemy TV application, the sound comes out of the built in port and the Alchemt TV port...

Does anyone know of any software that would let me route the sound through the Alchemy TV card?
I would give any sound routing software a try.

:)

Thanks very much for any help!