The instructions on the website tell you to download the kernel, patch it and then use a kernel driver.
If you never did kernel compilation ever, go get some infos and howtos on eg
www.tldp.org. There sould be also some remarks about patching.
Also, you can try using the alsa drivers, which you can download from
www.alsa-projet.org. Download the packahes, compile install, do some setup (all very well documented) and it should run fine.
G
raven