FS Passenger - Payload INI Modeling

Hi all,Sorry if it's not the right place to post this but I tried hard to get an answer from FSP forums to no avail! On the other hand, the more answers, the better!I've read the FSP tutorial on payload modeling but find it difficult to understand (sorry, Dan). The explanation provided there still seems a magic for me (defining contact points, CoG calculation, etc.). I have installed Aircraft Container Manager to help me with payload modeling routine but again - since I don't understand the magic hardcoded into FSP payload calculations, I cannot use it effectively. So, the question is: is there anyone who can explain me in (much more?) detail HOW exactly I can make a payload model for different types of aircraft?Thank you very much!