It's easy:
Create a directory e.g. yourserver.com/archive with e.g. FileZilla.
Drag and drop with Filezilla the complete HTTrack-archive to this directory
(remove the HTTrack systemfiles first!).
Make a link on your site pointing to yourserver/archive and you are done.
If you do not want to have the /archive/projectoverview/project/ directory
structure, just upload the archived files and point to index.html.
My example: www.dsb-klantenleed.nl/archief/