Very Basic Vindictus Modding
I found this while looking through with some of the files in Vindictus, I know most of the good hackers have already found this a long time ago, and I know there isn't much point to this but it makes the game seem a little better.
(For this tutorial I will change the music that plays when you enter the town.)
1: Goto C:/Nexon/Vindictus/en-us/sound/bgm/
2: Find bgm_colhen_01.mp3 and move it to a safe place so you can change it back later.
3: Take the song you want to play and put it in the directory.
4: Change the name of that song to bgm_colhen_01.mp3.
5: Run Vindictus and your song will play in the town.
You can also change other sounds, but those should be pretty self explanatory to change.