There is nothing hard with Project AI. You just need to download the PAI Installer and then download and open the pack of the airline you wish with it. That's all! The installation is very simple. The only problem with them is the quality of the models. So when you will get some more experience with AI Traffic you could switch to an advanced traffic system where you need to download schedules and planes separately and put them together. But for the moment try to become familiar with PAI.
Good luck .
Malyshev Yaroslav
"Avec l'avion, nous avons appris la ligne droite" - Antoine de Saint-Exupéry