Copied from Realtek Homepage:
Driver Package R2.17
Realtek HD Audio Driver support all of Realtek HD Audio Codec in WinXP/Win2000/Win2003.
Windows 2000/XP WHQL Supporting:
ALC880, ALC882, ALC883, ALC885, ALC888, ALC889, ALC861VC, ALC861VD, ALC660, ALC662, ALC663, ALC665,
ALC260, ALC262, ALC267,ALC268, ALC269, ALC272, ALC273, ALC887
HDMI Device WHQL Support: ATI HDMI Devices
OS Supporting: Microsoft Windows XP, Windows 2000 x86/x64
Pack with Microsoft High Definition Audio UAAV1.0a 5013 
Driver version:
Windows 2000/XP/2003: 5.10.0.5794
Driver Installation/Removal Procedure For Realtek High Definition Audio Codec:
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Setup Driver at first time:
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Windows 2000 , XP :
Step 1. Before installing the Realtek HD Audio Drivers, Press the
        [Cancel] button if Windows detect the Multimedia Audio device. 
Step 2. Run the setup.exe program to start the installation. 
Step 3. Click on [Next/OK/Go] to continue the procedure. If the Windows popup 
         Digital Signature Not Found  message, press [Yes] to continue the 
        installation.
Step 4. Finally, select to restart the system and press [Finish] to complete
        the installation. 
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Update Driver:
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Windows 2000 , XP :
Step 1. Follow Step 2,3,4 described in [Setup at first time] above to complete
        the procedure.
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Remove Driver:
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Windows 2000 , XP :
Step 1. Go to StartSettingsControl Panel.
Step 2. Select [Add/Remove Programs] icon.
Step 3. Select  Realtek HD Audio Drivers  and press [Change/Remove]
        button.
Step 4. Click on [Next/OK/Go] to finish the uninstallation.        
Step 5. At the end of the procedure, select to restart the system and press
        [Finish] to complete the uninstallation.
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Silent Installation:
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Run  Setup.exe /s /f2 /z[-rp] 
i.e. setup.exe /s /f2c:mylog.log /z[-rpC:RHDSetup.log]
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Silent Uninstallation:
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Run  Setup.exe /removeonly /s /f1 /f2 /z[-rp] 
i.e. setup.exe /removeonly /s /f1C:AudioDriverUSetup.iss /f2c:mylog.log /z[-rpC:RHDSetup.log]
Note: 1. Please update Directx version to DirectX8.1 or above.
Changelog:
Add/Fix
1.  Driver :
Customizations.