This mod swaps your body type to the human body type in the sandbox mode. You need to go to "Other" spawn it and press "U" for it to work. The animations are using the citizen animations. I tried to swap them out and nothing worked. I will remove this mod if Facepunch adds something like this into the sandbox mode without needing a mod. Also the swap will take a few seconds to load.

Update: The mod is now fixed and should work with the new S&box update.