Hi !
The things You wrote about did not work for me. I installed SiSandra to find out which motherboard and sound chip do I have.
So, the computer has the Asustek motherboard 03/02/2004-sis651-pizza
I looked for the MB model and got some link
http://forums.majorgeeks.com/showthread.php?t=46756
But driver for VAIO PCV-V1 did not work either. I started to download and to install all sound drivers from sony site in the PCV-V category.
PCV-V200G sound driver AN-E38600801AO04US.EXE works ok for my computer (WinXp HE)
With great regards,
Bad russian (no.email.addys@allowed.com)