I know Digital Performer like the back of my hand. I think I know what you mean. If you have your different tracks then just select what you want to bounce down to one track, then go under one of the menus (I think it's the "Audio" menu) and select "Bounce to disk". Name the sounbite whatever you want and select stereo, 16 bit. Hit OK.
Next go into your soundbites window and select the soundbite you just bounced. Select in by clicking on it and under a menu (in the soundbite window), select Export Selected Soundbite, or maybe it just says Export, but then it will ask you where you want it saved to. Hit OK and now it is converted into a 16 bit, stereo waveform in AIFF or WAVE format. You can now select this file in your CD burning software or whatever.