Use BG1 sound sets for BG2?

Is that possible? I grew quite accustomed to my character's voice from BG1 and I don't understand why they don't offer the original sound sets in BG2 as well. Maybe some additional action phrases were added in BG2?

And if that's not possible, is there an easy way to add new character sounds to the game? I googled around and only found overly complicated guides using some modding tools. I would have thought it would be similarly easy to using a custom portrait.

Also rant: why are there only a mere 4 female sound sets in BG2, all sounding weird in different ways? :-\