The frontend directory has the web interface in it.
The backend directory has the command scripts. You want these in a directory not accessable from the web.
 
Web setup:
1) Create a mysql database
2) Create a mysql user
3) import the dump: mysql dns < frontend/sql/dump.sql
4) Create Admin, Run this sql query
        INSERT INTO `admins` ( `userid` , `username` , `password` ) VALUES ( '', 'ADMIN_USERNAME', MD5( 'YOUR_PASSWORD' ));
 
5) edit frontend/includes/config.inc.php
6) chmod 777 frontend/compiled_templates
Admin Login URL /admin/
 
 
Backend Setup:
1) Place scrips in a directory outside the web interface.
2) edit backend/includes/globals.php
3) change this line to the correct path
4) require("/var/www/html/includes/config.inc.php");
5) chmod 755 *.php
6) ensure path to php is correct in all command scripts
7) Setup processqueue.php to run  on a cron as often as 1 minute.
    */5 * * * * /path/to/processqueue.php
 
Script definitions:
addzone.php - Command line Add Zone script
processqueue.php - This is the script that processes all changes made to zones
rebuildzones.php - Rebuilds all zone files, maintenance script
rewriteconf.php - Rebuilds named.conf
removeorphans.php - Removes orphans domains from your named dir. If it doesnt exist in the DB, it will remove the zone file
 
 
Notes:
 
Process queue link in web interface does not work yet.