Ubuntu 8.10 on Dell studio

I tried to install Ubuntu 8.10 on a new Dell studio desktop PC but encountered some problems with the sound card. After some browsing and trying different proposals this is how I got it working on my system:
1) Follow this instructions to install the latest alsa
2) use this line in your modprobe:

options snd-hda-intel model=6stack-dell probe_mask=1

3) reboot and adjust the volumes.