I thought I would give a bit of my own opinion on gallery sites structure...it is true however, that there are a few ways of creating this as some will be specific with their own methods...which is fine. I've done some gallery sites in the past until I realized that my link directory is keeping me busy full time and I have not had the time to continue. Anyways, with that being said, here is how I did mine and it worked well for me and never had problems being accepted (even in my own directory
...hehe) Anyways, I thought it would be best for an image heirarchy of how I did it.
gallerysites.jpg
Of course, as I mentioned, this is just my method and others will have their own. The folder called "Graphics" is where your site graphics are kept for all mirrors; "banners" is where your site banners and recips are stored (all in one location); "gallery-pics" is where you keep your 20 pictures with thumbs as well; "Keyword_mirrors" is basically the name you give for each mirrored copy of the site you just made; then of course each one has its own html pages for the site to give the function of individual sites.
Then you will see in the jpg here that "Site-2" is your second site for perhaps a different sponsor and then you just repeat what you did for your first site.
The idea I came up with for this is that pictures, graphics, and other images takes up a lot of disk space and just makes management of your images more complicated if you make a change and have to do it for "every" single mirror...so why not just do it once only and have each mirror site access the banners, pictures, and site graphics. I find that doing it this way doesn't affect the actual urls in the site layout (except behind the scenes to load the page graphics etc...but no one sees that. This method also allowed me to be a bit flexible with the design with each mirror as well (eg: use different banners on each one - for the same sponsor site).