Thanks to Doug's AppleScripts for iTunes for this awesome little app. I've search far and wide for this app, I'm so glad I found it. It's perfect for merging CDs into a single file. Join Together automates the process of joining the files of selected iTunes tracks together with QuickTime and exporting them as a single AAC Music or Audiobook file/track.
Download it FREE here: http://www.dougscripts.com/itunes/itinfo/jointogether.php