> This does not work: HTTrack saves more than one level of
> external links but additionally does not save the images 
of
> these pages.

Yes I think this was added to the TODO list some time ago, 
at least to investigate.  HTTrack's handling of "depth" 
works differently than how we would perceive the depth of a 
website.

So at the moment it's not really possible to do the one 
external page + images.