Hi:
There are no Vista or W7 drivers for that audio chip.
The only suggestion I can offer to you is to try the XP driver.
If the driver does not install automatically, then try installing it manually as follows:
Go to the device manager and click on the multimedia audio controller needing drivers. Click on the driver tab.
Click on Update Driver. Select the Browse my computer for driver software and browse to the driver folder that was created when you ran the file.
That folder will be located in C:\SWSetup\sp30578. Make sure the Include Subfolders box is checked and hopefully the driver will install that way.