Custom music replacement to the Original Campaign of WC3

[saneroot]

Hey, first I want to make this clear. I am not asking to change the music in a custom map/campaign I'm making. Instead I am asking how to replace the music completely, so the custom music would play in the original wc3/frozen throne campaigns.

Basically I am going for a more cinematic approach for wc3 as I am making a friend of mine play it through, and music would propably help with that. Thinking of stuff from WoW I guess.

If anyone knows a way, please let me know, And if this is the wrong forum, sorry. But this didn't seem to fit for any of them.