a person on another forum got the drivers from XP for that card, and did a manual driver update from control panel. Had to re-do the driver after a vista update replaced his microphone, but he's now happy with the results.
I have a X-fi xtreme gamer by Creative, have tried a lot of different drivers, but I still can't get some extras to work or appear at the control panels at all. I am using Vista Ultimate 32-bit. But after everything I have tested I started thinking that Microsoft made the "VISTA" that way so all hardware manufacturers keep using their DirectX-related methods for sound output. Maybe I am wrong, but that's the way I see it.