This RAR package contains all files necessary for the operation of Crystal CS4232/36/36b/37b/38b based sound cards, sometimes referred to as AW32 by some manufacturers. The driver is meant for Windows 95, since Windows 98 has a built-in driver, but it may work on other OS'es.
The driver is somewhat tricky to install. First, uninstall all references to your sound card (unknown devices) in the device manager. Run the setup program and install the driver. Restart your computer, and the computer should pick up the sound card automatically, and configure it.
If it asks for the driver files, point it to the the folder you extracted the driver to and let it continue from there.