Current questions and answers regarding the map editor.

The map uses its own files;)
'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su'
Copy these files to the root of the map and check at least "Tuesday" ;) (and there will be no xdb#xpointer(/AmbientLight) there). You can also easily extract the lighting you want from the resources and put it into the map.
"round" is rounding, you probably won't need it, so don't use it (or better, set it to 3.1 ;) )