If anybody has installed the new 2.02 version you might have realized that there is also a bug when trying to re-enable edain. A simple issue with music, here below is the fix devised with the help of Elf_in_silver_armor. I assume this should only be a problem for people that have both installed in the same folder.
To fix the 2.02 V7 - Edain conflict you have to find your Rise of the Witch-King Installation Folder (where you installed 2.02) find the file named !vanilla202music.big and rename it to vanilla202music.big. This will remove the priority for the file and therefore stop it from overwriting key Edain code. (thx elfu for the info on the bug's origin)