Ms Sanchez,
I think I may know where your confusion lies. What is being described to you is a method of making free sites assuming you have uploaded your images not into the folder your site is in but into an "image" folder.
Like your current site would be
http://www.mydomain.com/mycurrentsite/
Your images would lie in the image folder
http://www.mydomain.com/images/mycurrent site/
ok all your images are in that folder so all you need do is upload 7 more folders containing only the html (index main and galleries) for your site each differently named and all drawing from that one set of images. That way each link list gets the index page and no one gets left out and you dont have 7 copies of your images just the html.
The other way works yes, but most link lists even the smaller ones would really really prefer to be on the index page and it is certainly easy enough to do that only takes a few more bytes to help yourself and them out(remember even those smaller lists will likely grow in time!).