MOVIES

the extension must be ".avi", all LOWER CASE
Their default thumbnail is reffered to in $dg_movie_file in locate.php



HOW TO ADD A NEW SEARCH PARAMETER IN THE BROWSING
By parameter I mean any argument(s) on the url that can effect how/which 
pictures are displayed in the browse screens.

edit the file inc/list.php

0) Decide whether this is going to be a Pool (like year, movies, items)
   or an Option (like rating).
   The difference is that you can only view one Pool at a time, but many Options
   may be in effect.

1) Edit function load_by_form() to load your new paremeter into the list object
   I.E.  $this->movie = $_REQUEST['movie'];

2) Edit function check_for_safety() to make sure that value is safe
   I.E.  if (!is_numeric($this->movie)){ echo 'ERROR'; exit; }

3) Edit function set_to_default() to recognize your new parameter, if needed.
   set_to_default() changes an overly-general list (so far, only ones with no parameters)
   to ones where $this->year == numeric_interval 2004 to 2004.

4) Edit function describe() if needed so that a list with your parameter is
   described in an English sentence.

5) To make your parameter have an effect:
   If it is an Option, edit the $this->upc() function, and ONLY that! (Universal Photo Condition)
   If it is a Pool, then do some of the following
   -- Edit function query(), perhaps by adding something to the $where clause
   -- Edit function data_tree if you need to.  (this is used by browse_html and step)

6) If your paramter is an Option, you want it to be remembered when the user switched Pools, so
   -- Edit function options_url() to encode information about your parameter
   -- Edit function options_hidden_input() (if it exists) 

7) If your parameter is a Pool, you want it to be remembered when the user switches Options
   (e.g. he is looking at your vacation pictures (Pool)
      and then changes the rating (Option).
   So...
   -- Edit function pools_url() to encode information about your parameter
   -- Edit function pools_hidden_input() to do the same

8) To make it easy for people to use your parameter:
   -- Edit function browse_html()