To get proper scale, use kyle as a reference (simply merge kyle into the scene and fix the scale of your hybrid):
Tarsal bones were removed from the original Outcast skeleton. in Jedi Academy, Raven got rid of bones that were not needed. So everything's fine.
Ok now i see what you mean, that's simply because you're working with models that werent built to go together, so you need to attach them back as best as you can.