Each of those folders are from the data/mod folders of each individual mod (e.g speed mod and lockpick mod) placed in the modified main data/mod folder.
The speed and lockpic are working, I haven't been able to test the crafting and skillbooks ones, but seen as the lockpick and speed ones are working i'd assume the other are also.
P.S. I am a noob and know nothing of modding and how it all works, I was just experimenting with this