I believe the shadowmap calculation takes much longer than expected.
I deleted everything that does not need a shadow (only trees and buildings and walls are still inside the map now) and merge the shadowmaps after calculating them for this "dummy" map; however, it will still takes at least 10-12 hours ... if not more.
With 5000+ highpoly doodads, theres simply no way to get it done fast

...
But I can not really estimate the time at this point. I started calculating now. Lets see how much % I can get in two hours, then I can give you an ETA.
If somebody got a ridicolously good computer with a very strong SINGLE CORE processor (WE doesnt allow multithreading) with like 3000+ Mhz and don't care for the computer to not be able to do anything for a day, then maybe you can write me a PM, as it is definitely going to be faster on this PC then.
EDIT: Lol, I made a stencil out of paper with the percentages written on it, that I can hold onto my screen to find out how much % is done. Looks extremely weird, but whatever :>
EDIT 2: Hmm ... while waiting for the shadowmap to get completed, I will download Windows Movie maker to produce a small trailer
EDIT 3: ... I think this is gonna take VERY long on my machine. After one hour, I got roughly 4% ... of not less. That would sum up to at least 30 hours of calculating