Is there anyway I can grab and use files from a different Folder through programming?

Good Example.


[Games name]
[Source Part 1]
--[Random Stuff]
--[Random Stuff]
--[Decides to use files from the MUSIC Folder]
[Source Part 2]
--[Random Stuff]
--[Random Stuff]
[Source Part 3]
--[Random Stuff]
--[Random Stuff]
--[Random Stuff]
--[Random Stuff]
[MUSIC]