Sound files question..

I want to put the old male1 voice from BG1 into BG2 EE.. but BG2 EE does not have a "Sounds" directory so how do I replace the new male1 sounds with the old?
Will it work If I just make a override dir with Sounds folder inside??

Please help.. I am waiting for an answer before I play the game.

Also, before I begin my game, should I install any essential mods? Unfinished Business looks great but is it bug-free?

Thanks!