We would like to display a Large volume of images on our website, around 2000.

We would like to set up our website like this:

A content page displays 40 Thumbnails (Main List of Categories)
The user clicks on 1 of the 40 thumbnails, and is led to the 2nd level.
At the 2nd level, they have to choose one of 20 thumbnails to see a detailed gallery of pictures.
At the 3rd level, they have arrived at the detail page, and cannot go any deeper.

Is this possible. Ultimately, there's about three levels to each category, and the first two levels will show thumbnails... This seems pretty basic to us, but we wanted to make sure this set up is easily used with Simple Image Gallery Pro.

An example of what we are referring to can be found on this website: independentlocations.com. On the right side of the home page, there's a long list of categories. On the new site, we would have thumbs with each of those category names. When the user clicks on one of those categories, they go to another page with categories from a more specific topic, they click a thumb, and end up at a detailed page.

Thank you in advance for any input. We are very appreciative!!