change the song HO HO HO for the soundtrack of sixguns, also include the string to rename the song(i giving thanks to  Melting Terminal for the custom strings). if you want only the song open the zip and pass only the assets folder, if you have payday blt pass all the folder

Stealth:
https://soundcloud.com/gameloft/puzzle?in=gameloft/sets/six-guns
Control:
https://soundcloud.com/gameloft/quest-resistance-1?in=gameloft/sets/six-guns
Assault:
https://soundcloud.com/gameloft/quest-assault-2?in=gameloft/sets/six-guns