A site that i am hoping to copy from does not have any html file. it has a
folder that has only .jpg files.

the server will not list the jpg file contents if you try to access only the
directory address.

the pattern for the files that i need to download will be something like
bruteforce/trial and error to see if files exist

www.example.com/images/0001.jpg -- probably exists
www.example.com/images/0002.jpg -- probably exists
www.example.com/images/0003.jpg -- probably does not exist

if you can suggest a way for me to automate this through httrack. thank you!