I'll try to explain with an example:
Let's say you know the name of the levelset you'd like to play, for example "REALLY EASY MINE". When choosing levelset, you enter "EMC LEVELS" (or however it's named), then you enter subgroup "ORDERED ALPHABETICALLY", then "R", then "REALLY EASY MINE".
Or, if you'd just want to play something easy, you could choose "EMC LEVELS", "ORDERED BY DIFFICULTY", "LEVELS FOR BEGINNERS", "REALLY EASY MINE".
However, the mine itself isn't contained twice in the levelsets directory structure, the "LEVELS FOR BEGINNERS" just links to it in its config file, like this:
Code: Select all
link.1: emc_collection/alphabetically/r/really_easy_mine
[edit] fixed grammatical error(s)