This site is being deprecated.
Please see the official X‑Plane Support page for help.
many thanks for your hint, but the site you pointed me to is full of "developer stuff" and i don't know the ropes at all. I didn't find any documentation there. Therefore i want to ask you to be a little more specific if possible
There's a recent discussion on the x-plane.org forums, specifically this post from J Gregory has some detail about xlua.
This site is no longer being actively maintained.