I have a Shuttle SN25P with Nforce 4 Ultra mainboard and integrated sound(Envy24). What guide should I follow to get sound?

Some pictures:
http://img471.imageshack.us/img471/8498/1nb3.jpg
http://img471.imageshack.us/img471/1845/2mh3.jpg
http://img358.imageshack.us/img358/2657/3tn5.jpg

I don't know of any solution for audio for the Envy system. But you are free to look around the Audio link in my signature.