custom urls

Hi,

Is there any way I can have custom URLs like:
site.com/shoes/converse/gallery
and
site.com/shoes/converse/specs

where gallery and specs are not separate pages for EACH type of shoe?

In other words, I would like to just be able to grab that last part of the URL (gallery or specs) and do whatever I want with it, as if it were a query variable. But instead of query variables, I’d like to have them as parts of the URL.

I guess ultimately I’d really like to just have, for example, a gallery.php page, and then I will customize it for converse, and a specs.php page, and customize it for converse (or nike, or whatever – based off of the URL).

Is this possible??