No, I'm afraid not. The only way you get full surround sound out of your Creative soundcard is if the audio file is already encoded as Dolby Digital or, perhaps, DTS. The Creative card decodes this to your 5.1 surround channels. Audition outputs six separate audio streams for which you need a multichannel soundcard which has multichannel drivers. The Creative one doesn't AFAIAA.
Well, I finally did get (means, learn) the output assignments to work. It now places sound effects where I want them and I can pan audio pretty much 360 degrees. Being a video guy, this is a tool I don't use very often. Now just want to learn how to get Premiere's output in my full surround system. Thanks, rg