For some ideas I would recommend using a search engine and doing a search on:

Finding orphaned files on a website


I have used Xenu Link Sleuth to do searches on locally saved websites and old
Parsimony forums that I pieced together manually. You might try it after doing
the search engine search on finding orphaned files. But with Xenu, or any
other program used for locating orphaned files, I would be hesitant to trust
them outright, and saving a backup copy of any graphics they report as being
orphaned would be recommended, at least until positive the file is truly no
longer in use.


As to Httrack being helpful in locating orphaned files I'll leave to someone
else to answer.