been hunting around and the latest is for Win 2k, found this driver
http://www.nodevice.com/driver/CS4299/get43196.html
have a look at the Read me file.
and this is how to install, seems you have to tell XP to use the driver, it's a zip file so note the path to the unzipped files, use the If No Setup File method
Installing Drivers
Create a folder for what you are downloading
Example: Audio
Then download the zipped file to that folder
Then download and install Winzip
Go to the folder and right click and click Winzip extract to here
That will automatically make a folder and unzip files to it ( make a note of file path)
Then go to folder and click on Setup file and follow instructions displayed for installation
If no Setup file
1. Expand "Sound, video and game controllers"
2. Right-click the the yellow flagged device ( or audio device Realtek, Soundmax C-Media etc ) and choose Update Driver
3. In Windows XP SP2, the Update Wizard will prompt to connect to the Windows Update
4. Select "No, not this time" and click Next
5. Select "Install from a list or specific location (Advanced)" and click Next.
6. Select "Search for the best driver in theses locations" and check "Include this location in the search"
7. Click Browse and select the location of downloaded driver
8. Click OK and click Next
9. Wait while the Wizard installs the software
10. Click Finish.
Set a System Restore Point before installing drivers just in case
Start / All Programs / Accessories / System Tools / System Restore / select Create a restore point and follow instructions