This is my first .lua attempt ever so if there are any major problems I apologize, but I tested it over and over in different situations and found no errors, so for my first I think I did pretty well.
It basically plays the Final Fantasy 7 Chocobo Theme Song which fits perfectly (if you're a fan of Final Fantasy) with the Hawkstrider.
The addon was originally made by RPZip in 2008 but evidently was broken by Blizzard's many patches.
Then in April, 2010 it was tweaked by Newsaint who also added the song Always by Erasure but became broken in 4.0.1.
I simply fixed it for the current patch.
Feel free to post any errors/questions in the comment section
Open 'chocobo.lua' in notepad/any text editor.
Look for PlayMusic("Interface\\AddOns\\Chocobo\\chocobo.mp3");
Replace chocobo.mp3 with always.mp3 so it looks like this:
And you're done.