Download ConexantHDAudio 221_XP
Go to ControlPanel->System->Hardware->DeviceManager
Select your audio device marked with '?'.
Select Details.
Now yo can see something like:
AUDIO\VEN_14F1&DEV_5051&SUBSYS_103C30D9
14F1 & 5051 strins are "Conexant cx20561" or "Conexant HD-Audio SmartAudio 221" identification. Add the string 103C30D9 in .inf file located in
ConexantHDAudio 221_XP\XP32\WiSVHe5.inf
in a line like:
%HdAudioFunctionDriver.Hermosa5051.DeviceDesc% = HdAudModel,HDAUDIO\FUNC_01&VEN_14F1&DEV_5051&SUBSY S_103C30D9
Save and install the driver. Now the installer will recognize your hardware.
Gool look!!