> looked at what it saved to my disk, it was an unreadable 
> binary file (completely different from what I viewed 
> using 'View source' in browser). I suppose the file is send 
> in binary form, perhaps zipped or whatever. Can HTTrack 
> handle such files?
HTTrack can usually handle g-zipped HTML.  Try to open the binary file in
something like Winzip and if it is a zip file then either HTTrack is not
saving correctly or the wrong header type or something is being sent by the
server.