I'm all for this. While the additional choices in CtB's portrait and voice pack are great, I don't use a good number of them because they are from BGII and are tied too heavily to the character in question. (Minsc and Jan Jansen, for example)
@Zorn - In the future I can provide you with an NPC's entire dialogue file if you like, so you can see the PC interaction that's supposed to be going on. The raw dialogue files aren't entirely easy to read and understand, however.