I got everything clean, the program, the ROM, and the music. I'm just going to try CMD since that is what the tutorial asks to do. I'm using CMD but doesn't want to open it, even though I input the code exactly as the tutorial says, but nothing. Do I have to drag my ROM to the Addmusic?
no.
Just to clarify you followed these steps:
1) Put rom in "Addmusic" Folder
2) Put CMD in "Addmusic" folder
3) Put song (renamed as "Have Star") in MISC. folder
4) Open CMD
5) Type: addmusic romname.smc -se*
6) Open Lunar Magic and set level to Custom Music (Cannot be the original soundtrack)
7) Play Level
8) Get Star
*only needs -se if it's the first time inserting music
So remember kids! If you ever get caught having tosave a princess from a foreign land after getting dragged down a drain pipe, jumping while spinning in a circle can help you greatly by allowing you to jump on spinning saw blades, ghosts, and allow you to control your jump better!