Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
If your card has the CS4231 codec then use file azt16b95.zip.
Although these were written for Windows 95 they should work equally well in Windows 98.
Unzip to a temp folder/drive and decide which file you need before applying. There is a screen shot of the website explaining the differences in the 2 versions (htm file).