A few generic spoken lines in Oblivion annoy me, and I'd like to replace these phrases with others from the game. I unpacked voices.bsa to disk using BSA Commander, can I just copy/rename/replace whatever MP3/LIP files I want and then repack the BSA? Or is a 3rd party utility required to do this? Thanks.

EDIT: sorry for the title, should be: "do I need 3rd party utils to move audio around".

just copy/replace will work provided they are in the right format and are named the right thing. you don't even have to repack the bsa technically.

Thanks for the quick reply. Awesome.

BSA Commander unpacked the bsa file to a \sound folder directly off the root. Do I need to move this to a folder under \Oblivion\Data?