These drivers are direct X 6 certified.
Installation is simple. Download the file and double click on it to extract it. Two directories should appaear in addition to a readme. To install the card just enter the disk1 directory and run setup. (its pretty easy from here on in just click next.)
If you experience problems, try removing the soundcard by entering the controlpanel / system then clicking on the device manager tab. The soundcard should be listed as a opl3-sa3 card under the other devices area. click on this to select it then hit the remove button. Now re-run the setup program from disk 1 again.
Hope this helps