Yes that's exactly what I am currently reversing, in fact I just needed to extract automatically spawn locations from the packages that are activated when clicking on a door and now it's done so I think I am not far of a working solution, there is still the packet to reverse and the doc to write but I have hopes to find time. ^^
For the portals the data is also extracted and the process is almost completely understood but there is still a bit of stuff to reverse.