Okey, well, well.... seems I can not do that, my windowmanager (marco) thinks it is command to him.....
I deleted the sections in xml-file, put them in again, and then removed actor attribut. It all simply changes nothing. It is there but unselectable in Atlas and not there in the game.
The biggest part of the problem is calculating pathfinding and collisions between units. That's the main source of problems in all RTS games. And unfortunately, it has to be done in real time.