I have a Creative X-Fi Extreme Gamer card in my current Win 7 7201 64-bit build. I installed two things based on recommendations in another thread on this forum
: Creative Sound Blaster X-Fi Series Beta Driver 2.18.0013 Creative Console Launcher 2.61.09
It's working GREAT with ZoomPlayer for movies with the ffdshow audio codec, Foobar for playing audio, and Windows Media Player itself. I typically only install the driver
and launcher anyways, since I don't use the Creative file management stuff. The console launcher gives you access to the configuration panel for changing settings in Entertainment, Gaming, and Audio Creation modes of the card.
I suspect the driver and console launcher link will work with any X-Fi series card. Bear in mind I installed these using VISTA compatibility and as Administrator.