I have some animations I added to my package that I want to put in a BHAV, but when I try to add them it only shows the anims pictured (not the ones I added).

How can I make my added anims show up as options?

You need to put their names in respective STR file - that's the source from where that wizard chooser gets them.

Find the file for the right age and species (or create one if there isn't already). Little help: http://modthesims.info/wiki.php?title=STR
Copy animation's name without the _anim part and paste it that file on a new line.

Ah thanks! It's been ages since I tried playing with animations and I totally forgot that part.