Currently the mod for these two characters is 99% done. There are exactly five sound files that I have yet to identify in-game, so if you here the following being spoken-aloud by either Yooka or Laylee;
"Banjo", "Discord", "Apple", "Kiwi", or "Vegetable"
Then please let me know when and where you heard it in-game and what the characters were doing when it happened.
That way I can fix up those sounds as soon as possible and update the pack.
I've also yet to find which .bnk has Yooka's "mmm" sounds for when he eats a berry. If anyone happens to know which they appear in (as they don't appear in any of the .bnk files that contain the rest of his sounds), that'd be super helpful!
Depending on how the modding community develops onward from this release, I may replace a few other characters with Banjo-Kazooie characters, but at present I have nothing specific planned in that regard.