ProTools question

[Ludden, Keith]

Listers:  

Forgive what may be an elemental question from a newbie, but help me out if
you can.  I have begun developing small audio pieces on Maine tradition
bearers, using ProTools Free.  When I bounce the mix to disc, and tell is to
use WAV, AIFF, RealAudio, or Quicktime formats two documents are created,
one for the left channel, and one for the right channel.  How do I combine
the two documents so I can send them as a single stereo document?  

Thanks in advance, 

Keith Ludden 
Maine Arts Commission