I am not a ll owner, so you may not want my two cents, but I'm doing okay so far getting listed, I thought I'd try to help
I put all my thumbnails in
www.mydomain.com/site/tn/
and all my full size in
www.mydomain.com/site/fs/
then my site is held
www.mydomain.com/site/
www.mydomain.com/site/mainpage.htm
www.mydomain.com/site/g1.htm
www.mydomain.com/site/g2.htm
There are a few linklists that want to be on the index page(cleo's and penisbot for example)and also want a natural flow and that works fine because when they click on a fullsize it is
www.mydomain.com/site/fs/1pic.jpg
Other linklists(many)don't have a rule about being on the index.html page(yet)
so any mirrors could be portal.html, warning.html etc.
To stay on the safe side, you could just do
www.mydomain.com/site2/
and that is only the index, all the links point to the first one.
so the 'enter' link would point to
www.mydomain.com/site/mainpage.htm
that way you don't have to copy everypage and pics to several different folders, just make a new folder with an index with diff recips.
The ll that don't have a rule yet about being on index, 99% of the time don't have a rule about natural flow eitheir.
Basically what I'm saying after all that, is that few linklists want natural flow, make sure you abide for those and for the other ll that don't need it, this seems to work fine for them.
Uhh, hope this helped, it's late and hard to make sense.
---chris