Ok Well the Programme u need is
MyWarCraftStudio
Download :> Files » Programs » MyWarCraftStudio 0.9
Ok now lets get Started
Step 1 : Open MyWarCraftStudio \/
Step 2 : Go to Pack(P)
Step 3 : Press Edit MPQ archive
Step 4 : Open Common.MPQ in your C:\Program Files\World of Warcraft\Data
Step 5 : Find what u wont to change like I will be doing Stormwind Zone Music so i am going to chose intro thats when u first get in stormwind liek from Elwen Forest or w/e
Step 6 : Rigth Click your Game music u are going to change and press Rename
Step 7 : Press These button that has three dots (like this " ... " )
Step 8 : Then find and Chose what music u wont
Step 9 : Press ok and now is the hard part
You must Get the code rigth in were it highlighted in the Picture \/
In there u must put the Rigth path of werre the music was couse the game is playign that path when u get in stormwind u need the path to be right for me it will look liek this
Sound\Music\CityMusic\Stormwind\stormwind_intro-moment.mp3 \/
Step : 10 to find the treePath is befor u start modiefyig open up Note Pad and right click the MPq your modifying and press Copy Treepath \/
and in the note pad you open press Ctrl V or Rigth clcik and Paste or what ever u do to past in the notepad and thn u add he musi and insteed of the Music name and stuff in the Box put what u have in the note pad and your done u cna allso play the music when ever u wont buy typeing a command for my it will be
/script PlaySoundFile("Sound\\Music\\CityMusic\\Stormwind\\stormwind_intro-moment.mp3")
And there u go pefect little kool thing to know if u get bored of Blizz music