OK first off creative's drivers are s*** NIX them.
then go to http://kxproject.lugosoft.com/ and download these drivers. make sure to turn off hardware accel in opf (or it will sound like crap). This fixed all my sound problems. But(there is always a but, right), you will lose eax support (untill they can figure it out to support it). Hope this helps. oh and the drivers will swap your rear and front.
chow