Sorry to bother but now i dont know how to instal thous mods can someone help ?
You download a mod and place the folder in the games "mods" folder, which should be located in the same folder as BeatBanger.exe.
So it should look something like BB 1.311\win64\mods\ *the mod you want* \ and in this folder you should have the mods own files and folers, such as anims, sfx, songs, textures, chart.cfg etc.
Then just start the game and look under Mods for your custom levels. These might not always have the right name for the level, so it's easier to just get a couple of mods to go through at once.