You can take the original clip/file, open it with QuickTime Pro, select in and outs for the first piece, command – c (copy) that, then open a new blank instance of QuickTime player and command – p (paste) it. Save that and clip 1. Go back to the player window with the original, make the last out point the new in point. Select an out point, and repeat the precious steps to save the second clip, and repeat all till done. Just one way to do it.