Not to disappoint you but i think Creative has no support for that card outside windows yet.
Check this site for the list of supported sound cards:
I used to buy creative but after lots of problems with their drivers and lack of proper support in Open Source OS's, i decided to look elsewhere...
Not to get disappointed, i bought a 'Sound Blaster Audigy 4' sound card. Then i downloaded a 'Emu10kx' audio driver from pbi directory and installed it. Now the sound works perfectly on PC-BSD.
Thanks a lot for your advise, guys.