Use Mapper to edit maps. In mapper console *new to make new map ~[mapename] to load it,
^[mapname] to save. There should be readme in the mapper folder, in Russian. Making quests
is more complex, quest can involve any aspect of development, from dialogs, mapping to scripting,
finally even making some additional graphics and sounds. There is no single recipe for it. The simplest
quest require some dialog at least, so check out DialogEditor. SDK is poorly documented though, so
you have to be very persistent in learning if you want to do anything with it.