This is an .esp to add Jeremy Soule's music from Neverwinter Nights to the game, for a truly Soule-tastic experience.

Here's what to do:
1. Extract this mod to your Skyrim data folder or install it with a mod manager.
2. Grab all the .bmu files from your Neverwinter Nights installation. They should be in the music folder--pretty easy to find.
3. Convert them to .wav files with your favorite media software. (VLC version 3+ can do this through the GUI. Open them all at once and select "CD Audio" as the output profile.)
4. Move them to the music/nwn/ folder provided by this mod. Double-check you have all the right files using the list provided.
5. That's it!

Make sure you have all these files before you test it, otherwise you might get a crash: 
mus_bat_aribeth.wav
mus_bat_citboss.wav
mus_bat_city2.wav
mus_bat_city3.wav
mus_bat_dragon.wav
mus_bat_dung1.wav
mus_bat_dung2.wav
mus_bat_dung3.wav
mus_bat_endboss.wav
mus_bat_forboss.wav
mus_bat_forest1.wav
mus_bat_forest2.wav
mus_bat_lizboss.wav
mus_bat_rural1.wav
mus_castle.wav
mus_citydockday.wav
mus_citydocknite.wav
mus_citynite.wav
mus_cityslumday.wav
mus_cityslumnite.wav
mus_citywealthy.wav
mus_crypt1.wav
mus_crypt2.wav
mus_evildungeon1.wav
mus_evildungeon2.wav
mus_forestday1.wav
mus_forestday2.wav
mus_forestnite.wav
mus_gendungeon1.wav
mus_mines1.wav
mus_mines2.wav
mus_richhouse.wav
mus_ruralday1.wav
mus_ruralday2.wav
mus_ruralnite.wav
mus_sewer.wav
mus_store.wav
mus_tavern1.wav
mus_tavern2.wav
mus_tavern3.wav
mus_tavern4.wav
mus_templegood.wav
mus_templegood2.wav
mus_theme_nwn.wav

This will conflict with other music addons, but it should be easy to merge. Come to think of it, if you aren't super familiar with how Bethesda data files work, messing around with a simple mod like this would be a great way to learn!