Managing and adding Media

[RayBe]

After working a lot with xbmc, i am wondering how to manage/add my media in lmce, i can't seem to find the answers in the wiki's.
I have 1.5 TB of mkv-movie files and music, all managed with an external media manager (http://www.embermm.com/)

does lmce have a way to manualy manage my media?

Wat is the proper and right way to add all of my movies and music?
I have all of my media stored on a internal 2TB disk.

I wanna be able to determan the fileformat, i do not want to compress the movies or music, i want the best  quality (HD space is no problem)

Also i want to be able to choose my own movie thumbs, scenario's, cast, artists, etc.

Any help is much apriciated,

Raymond