configuring winamp to output rear speakers only

[cyaniron]

Hi,
For a 7.1 soundcard. Is there any way to configure winamp to output to the rear speakers only?. I can see settings that enable me to have front only, or all speakers.

I am wanting some other software to output to the front speakers, and winamp to output to the rear.

If this is not possible can anyone think of some work around (other than buying another soundcard).

Thanks