Nothing to do with iTunes, you download the wave or mp3 files you have recorded directly on to the computer HD, where you can edit them as you see fit in a program like Audition or Amadeus, divide up into tracks or whatever, convert to mp3 if necessary, and _then_ import them to iTunes if you really want to.

(And I told you why you want the Edirol rather than the Zoom, so _don't_ believe me... :-)

(And yes, I'm a Maccie - both Edirol and Zoom download directly to Mac or PC - hook it up to the computer and it looks like a remote drive).