Adding a Planescape:Torment NPC to Baldur's Gate?

Just curious, has anyone ever modded adding a Planescape:Torment character to BG1 or BG2?

I was trying to think how it could be done. I assume you'd probably have to use an existing BG2 animation. The sound files are all there already. They'd need a Baldur's-Gate-compatable portrait.