Programmatically post to forum

Hi, I need a php script that would post data into a forum programmatically. I still didn't decide which forum engine I will use. Basically, what I need is to set up the forum on my server and then to fill it with the data. From you I need the following 4 php functions: 1. Function to add new user to the forum and set some basic info for him including (random) avatar. 2. Function to create a forum thread. 3. Function to create a topic in the thread. 4. Function to create a post in the topic as a specified user.