Batch Upload Script In need of batch upload script

I'm in the process of making a photo gallery script. I need ideas on how to make a batch upload script. I want the user to be able to upload files to a folder via FTP and then go to the admin section of the gallery and add the previously uploaded photos to the MySQL database. I guess what I need it to do is find all the files in a specific folder and see if they are already in the database, if they aren't in the database - add them. Any help would be appreciated. I figured Xisto would be a good place to get help with this

put the info at these two pages together:

http://www.jonhaworth.com/articles/php/list-files-in-directory

http://www.php-mysql-tutorial.com/php-mysql-upload.php

also, you'll want to use the imagecopyresized function from php
http://cn.php.net/manual/en/function.imagecopyresized.php
to generate thumbnails to put in the database as you do this.