Problems setting up surround sound on a CMI8738 sound card

Hi everyone! Can anyone help me set up four channel and/or 5.1 surround sound in SuSE 8.2? I have a CMI8738 integrated sound card, and I was unable to set it to play on all 6/4 channels (I only get stereo sound). There are no varaibles for surround sound when I try to configure the sound card with Yast. I also tried modifying the /etc/modules.conf file to add 'options cmpci four_ch=1' line, then restarting ALSA, but nothing spectacular happened. On the SuSE site, my sound card appears to be fully supported! Thanks! Srdjan