Howdy, Carly_kins! I'm sorry to tell you that the APE 2 download from Zoo Tycoon Center is no longer available for download. :sad We just discovered that the other day, when someone else asked about not being able to find it. So, the best thing I can suggest is to do two things:
1) Search the Editing topics in Technical Support and see what you can 'gather' from there.
2) Go visit ZT2 Designing Centre
located here which is a site started by Penguinman and Gibbon Fanatic SOLELY devoted to creating and designing.
I know it's not much help since APE 2 is no longer available, but maybe some other help will turn up.