I second that.
Occasionally you'll also get files in the form of .001, .002, etc. which are recombined with a par file. The par file verifies all the pieces then recombines them into a single file (usually video). Since the pieces all come back complete when Alt.binz checks, the par files are never run to combine them. Alt.binz also deletes the par files (if you have the option set) so you can't manually do it.