As for the Vista Sounddriver you are seaching for:
>> ASUS K8V-MX -X main board
Look first at [url]www.asus.com[/url].
No driver there? Your luck has run out...
Just looked...NO Vista driver....:-))
If you still want to try, look for:
ADI AD 1888 soundchip driver.
BTW: If you want to run Vista in any decent way, upgrade your mainboard, your processor, your videocard, and get at least 1 Gig of ddr-2 memory.
Your system as it is now, is waaaaaaaaaaaaay to slow to run vista. ( other than home-basic, in which case you better stick wit XP.