At Chosen of Mystra they've got a guide on how to make a sound set (It is very easy, I made 2 in a weekend, I'll have to redo some, probably in the coming week for BGEE). I don't know how many sound files there was for Planescape: Torment but there is quite a few.
Inspired by this thread ("Dialog mostly voiced?").
Making a double post/second post on what I'm voting.
Don't forget to tell if the Poll is bad (with suggestions/feedback) so I can make it better before Edit time runs out!