Batch loading users via SQL

We are developing a tech social networking website for a client. This site will have a message board where tech gurus can create and respond to posts. Since it is a new site/forum, the client would like it quickly populated with 500 users profiles and 5000 posts. Doing this will help attract other "real" users to the site and the site will not seem as "new" The Need - a script that will batch create 500 users. each user will have an avi - a script that will batch create 5000 posts and 10,000 replies to those posts that fit the various forum categories - the execution of the script to create the above - virtual training or instructions to understand how the script works What we are using: Software: Drupal DB: MySQL 5 Servers: Running highly customized Linux OS with Apache web server and PHP, Perl, Python, TCL, Ruby and MySQL available Here is some background on loading batch users on drupal: [login to view URL]